1. Introduction
Quails of the
Coturnix genus (mainly,
Coturnix coturnix and
Coturnix japonica) are raised in game farms for hunting purposes, among other uses. In several European countries such as Italy [
1], Greece [
2], the Republic of Serbia, Montenegro, Romania, Spain [
1,
3,
4], and others, these farm-reared quails are released in hunting preserves in order to ensure or increase the number of hunting bags [
3,
5,
6]. Put-and-take shooting, training dogs to retrieve birds, or shooting quails that are thrown with an adapted clay-pigeon shooting machine, are the most common uses for game farm-reared quails. The European, or common quail (
Coturnix coturnix Linnaeus, 1758), that is autochthonous to Spain, has been identified as a bird species with an unfavourable conservation status [
7]. Since the 1970s, in Spain the number of annually hunted quails has decreased by around 30% [
5]; indeed, around 1,200,000 quails were hunted during 2019 [
8]. This situation generated a demand for quails, to be used for hunting purposes, that has been satisfied by game farms.
The main species of quails that are being farmed for the hunting market are the common or European quail [
9,
10] and the domestic Japanese quail (
Coturnix japonica, Temminck and Schlegel, 1849). Hybrids of both species are also being marketed more frequently, which are usually obtained by crossing female Japanese quails with common quail males, and successive generations are backcrossed with common species males. The latter two types of quail are more easily farmed than the European quail because of their better reproductive performance [
5,
11,
12,
13,
14]. The European quail species is most appreciated by hunters due to its wild behaviour, whereas the Japanese and hybrid quails are less accepted by the hunting community due to their tame character and poorer flying ability. In addition, Japanese or hybrid quails releases for restocking purposes are banned in several European countries because they are not native species [
2,
11,
12,
15]. Due to their wild character, purebred European quails are difficult to farm and, in addition, they have a shorter reproductive season and a fewer number of eggs laid per female, compared with domestic Japanese quails or the hybrids [
10,
16].
The game quail farming model [
9,
11,
14,
17] is similar to that of other gamebirds, such as partridges and pheasants [
14,
18]. These gamebird species are subject to a similar reproductive management regime; breeding quails are housed indoors in battery cages, and two raising phases are completed before the quails are sold as hunting birds. The chicks are first reared in brooder houses on the litter floor (rearing phase), and they are subsequently raised in large open-air flight pens to exercise their flying ability until they are sold (finishing phase). There are also farms in which the rearing phase is carried out by housing the chicks in battery cages, until they are moved to the flight pens. The specialisation of the sector has led to two main types of quail game farms: complete-cycle farms and finishing farms (with no breeding flock) in which, starting at around 40 days of age, quail chicks are raised in flight pens. Moreover, there are few farms without breeding flocks where one-day-old chicks are raised until their sale. In complete-cycle farms, the female reproductive cycle begins between 42–45 days of age, and it lasts until the birds are between 5–12 months, depending on the species reared [
9,
11,
14,
17]. Reproductive performance increases if artificial photoperiod supplementation is applied to the breeding birds [
9,
14,
17]. Artificial incubation is used to hatch the chicks [
11,
14].
Game quail farming and hunting-based activities are complementary resources for the rural sector [
4,
11] with a relevant socio-economic impact [
5]; however, to date, this sector has not been sufficiently studied. Therefore, the aim of the present study is to characterise the game quail farming sector in Spain by using variables that are related to farm structure and management, as well as marketing and advertising strategies. This will provide valuable knowledge on this alternative poultry farming system and its diversity.
4. Discussion
There is little scientific [
4,
10,
16,
17,
25,
26,
27] and informative literature [
9,
11,
14,
23] regarding quail game farming; indeed, to the best of our knowledge, this research provides the first systematic characterisation of Spanish quail commercial game farms, as a result of directly interviewing farmers, and through the study of variables related to their structure, management, marketing, and advertising channels.
Although quail farming for hunting purposes began earlier in other countries, such as the USA and Italy [
28], some of the surveyed quail game farms were first established in Spain during the early 1970s (
Figure 1), in accordance with that reported by Pérez y Pérez [
23]. Quail game farms emerged contemporaneously with the establishment of the first red-legged partridge game farms [
4,
18,
19], and in Spain, production both of these species was considered to be pioneer in terms of game farming. In fact, the commercial game farming of quails began in Spain before the game farming of pheasants (which started in 1980 [
20]) and wild rabbits (which started in 1975 and became increasingly popular from 1990 [
21]). Most of the surveyed quail farms were established between 1988 and 2003 (
Figure 1), when other main game species were being farmed (red-legged partridge, pheasant, and wild rabbit) and consolidated as an important part of a new, alternative farm sector in Spain [
18,
19]. This might have been a consequence of the technological progress that was being made in terms of breeding and incubation techniques [
29], the production of specific feed for gamebirds [
30], as well as the promotion and extension on game species farming by companies, game organisations, and technicians, which was being carried out during this period [
18,
31]. The drastic decline in wild quail populations [
4,
7], and the growing demand due to the high number of hunters (more than 1,200,000 hunting licenses [
32]) that took place in the 1990s, also contributed to the spreading of quail game farms across Spain.
Alternative poultry farming was considered to be an available option for farmers with few economic resources since it enables them to reuse abandoned lands and old facilities [
33] to develop an interesting complementary activity. This may explain why all surveyed quail game farms raised more than one game species (
Table 5). This has also been seen in characterisation studies of red-legged partridge [
19] and pheasant [
20] game farms in Spain, of which 27% and 76% of them, respectively, produce more than one game species. Only 19% of Spanish wild rabbit game farms, however, produce other game species [
21]. Many of these farms raised a combination of quails, red-legged partridges, or pheasants because their husbandry uses common technologies and facilities with respect to artificial egg incubation, chick rearing in brooder houses, and bird rearing in flight pens during the finishing phase of bird raising [
9,
14,
18]. Therefore, quail game farming is not an exclusive farming activity, and it is usually associated with farming other game species in order to cover most of the possible activities and demands that are related to game market.
Regarding the average size of complete-cycle farms, the data obtained in this study present a broad range of breeding flocks, ranging from one hundred up to 15,000 females (
Table 2). This diversity is due to the fact that there are farms that have reached a profitable business size, in addition to smaller farms that engage in other, complementary farming activities, as has been previously seen in other game farming subsectors [
19]. In fact, quails are often produced on red-legged partridge game farms as a secondary product (Empresa de Gestión Medioambiental, 2007, cited in González-Redondo and Sánchez-Martínez [
21]). The breeding female/male ratio (3.6 females per male) recorded in the present study (
Table 2) is in accordance with the ratio that was recommended for quail game farming in Riesco [
14] (2–4 females per male), and it is slightly higher than the ratio described by Caballero de la Calle and Peña [
11] (2–3 females per male) and Dalmau [
9] (3 females per male). With regard to the number of birds produced per year, the total annual production of surveyed farms, excluding the largest farm, was 880,000 birds, whereas the largest farm reported a total annual production of 580,000 quails. Therefore, the total production of surveyed farms showed an evident polarisation in terms of quail production as just one of the farms concentrated around 40% of the commercialised game quails in Spain.
The beginning and end of the breeding quails’ reproductive life reported in this study for the quail game farms are in accordance with the reviewed literature on general quail farming [
9,
34]. However, several authors agree that the female quails’ reproductive performance decreases between 5–6 months [
9] and 10–12 months [
34], and that the use of artificial lighting contributes to a better reproductive performance [
9,
14,
17], which is why almost all of the complete-cycle farms in our study use supplementary artificial lighting. The period of time in which eggs are produced is significantly related to genetic purity. The European quail species has a shorter laying season (around four months) [
10], particularly when kept outdoors [
17], due to the reproductive seasonality typical of a wild animal [
23], whereas the Japanese species has an egg laying period that lasts up to 12 months [
9,
34,
35]. However, four of the surveyed farms that were reported as rearing the European quail species bred quails which had a laying period of 12 months, which casts doubt on the genetic purity of the breeders.
Breeding quail self-replacement, which is a strategy followed by all quail farms (and that is the only replacement practice in three quarters of the surveyed farms), is also the same self-replacement strategy used in most game farms raising red-legged partridge [
19], pheasant [
20], and wild rabbit [
21] in Spain. Although continuously maintaining the self-replacement strategy across many generations can lead to inbreeding problems [
36], most farms follow this replacement strategy because the wild nature of game species made more difficult their reproduction in captivity, compared with domestic livestock species; thus, game farmers choose the offspring of their best quails as future breeders, in order to obtain better reproductive results.
Data obtained for the rearing phase length in the brooder house (
Table 3) are in accordance with the reviewed literature. Indeed, Dalmau [
9] and Caballero de la Calle and Peña [
11] recommend an indoor rearing period of 25–30 and 40–45 days, respectively, for game quails. The bird density data obtained during the rearing phase (
Table 3) are also within the range of recommendations in the literature: 30–40 quails/m
2 [
11] to 50 quails/m
2 [
9]. National law regarding the management of poultry farming [
37] does not set recommendations or limitations on the stocking density of quails when they are being raised. The mortality during the rearing phase (
Table 3) was lower than the 7.5–10% reported by Blanco [
34] for Japanese quail and by Caballero de la Calle and Peña [
11] for game quail. Although it is well-known that the stocking density and lighting parameters are factors that affect the welfare and health of quails [
38,
39], the absence of an association between both parameters with the relatively low mortality rate observed during the rearing phase, could be an indicator of the good management of birds in quail game farms.
Most farms decide the beginning of finishing phase (
Table 3) in accordance with climatic conditions; therefore, moving birds to the flight pens may be delayed if necessary, particularly in rainy weather [
9,
11,
14]. In this survey, the period of time in which quails remain in the flight pens (
Table 3) was in the lower level of the interval referred to in the literature, which ranges between 15 days [
14] and 30–45 days [
11], with longer periods being advisable to improve their ability to adapt to field conditions in the wild. In this study, the quail density recorded during the finishing phase, in the flight pens (
Table 3), was below the range that was recommended in the literature, at 20 birds/m
2, thus permitting to improve birds’ physical condition to achieve a vigorous and fast fly and to minimise feather pecking, which devalues birds [
9]. The mortality in this period (
Table 3) was mainly caused by bad climatic conditions, and registered very low values. In fact, no association was found between stocking density and mortality in the flight pens.
As releasing Japanese or hybrid quails for restocking purposes is forbidden in most European countries because they are not native species [
2,
11,
15], many of the farms affirm to produce the common or European species (
Table 4), although without a genetic guarantee. For management and economic reasons, most farmers prefer breeding females displaying a longer laying season and greater level of productivity, which this implies the use of hybrid or domesticated quails rather than the common species. Consequently, for this variable, the veracity of the data arising from the survey should be questioned because many of the interviewed farmers that claimed they produced the European species cannot guarantee the purity of the species. Releasing quails other than the common species (hybrid or Japanese) for restocking purposes may cause biodiversity problems (alien genes introgression) and a decrease in the population of the native species. In order to reduce the likelihood of either circumstance, a reliable genetic control of farm-reared game quails should be established in order to certify the origin of the birds when they are released for restocking [
40]. In fact, several Spanish regions have legislation in force or in project regarding this matter [
41].
The main product offered by all game quail farms is a bird with excellent flying abilities, to be released and shot, mainly in private hunting preserves, throughout the year (
Table 6). In addition, the intensive hunting preserves where clients hire an organized hunt with releases of quails, red-legged partridges and pheasants [
4], often jointly, are becoming more and more frequent. All of the surveyed farms also sell quails to train hunting dogs in order to track and retrieve gamebirds that have been shot (
Table 6) [
9]. A somewhat lower proportion of farms (62%) offer quails for shooting via machine-throwing (
Table 6), which is a hunting modality in which the birds are launched with a clay-pigeon shooting machine that has been adapted to launch live quails [
9]. This is a controversial practice that is being banned in an increasing number of regional districts in Spain, and the Spanish Government is planning to enforce a nationwide ban [
42] because it threatens animal welfare; therefore, the commercialisation of this type of bird is restricted to those provinces where shooting birds that are thrown from machines is not yet forbidden, though it will probably be fully banned by 2023.
According to statistical data from MITECO [
8], in 2018, the total economic value of the 1.04 million quails hunted in Spain amounted to EUR 1.5 million. It is important to highlight that all of the surveyed farms reported a total annual production of 1.46 million birds. Although many of the hunted quails were wild, comparing the number of produced quails with hunted quails, it can be assumed that the surveyed farms were able to cover a large part of the total national demand, and they were able to generate enough in terms of surplus for foreign markets. The average sale price of the quails obtained in this work coincided with the value reported in the statistical data from MITECO [
8] (EUR 1.5 per quail). The objective of these game farms is to sell birds for most of the year in order to satisfy the demand for the quails’ different uses, and thus, to guarantee a regular income.
Compared with red-legged partridge farms [
18], game quail production has a low seasonal pattern; therefore, two thirds of the interviewed farmers offered their products throughout the year (
Table 6). This is made possible due to the high likelihood that the breeding flocks used in most of these farms were either of a hybrid or domestic genetic type [
11,
14], because purebred European quails display a marked reproductive seasonality [
10]. In fact, in Spain there are many intensive hunting preserves where hunting is authorised all year round [
43], thus generating a continuous demand for quails.
Services supplied to customers by the quail game farms, as evidenced in the present study (
Table 7), coincided with those reported in previous characterisation studies of game farms in Spain [
19,
20,
21]. The proportion of quail game farms that transport birds to their destination, at the request of the customer (
Table 7), was at a similar level to the proportion of red-legged partridge (85.7% [
19]), pheasant (88% [
20]), and wild rabbit game farms (85.7% [
21]) that offer the same service. The high proportion of game farms offering customers the possibility of delivering purchased animals to their destination is explained by the fact that transporting game species is not easy to carry out due to their wild nature and tendency to become stressed [
44]. Moreover, this also occurs because the requirements for transporting animals, according to European Union regulations, are complex [
45]. Organising quails releases in the client’s preserve (
Table 7), upon request, is a service offered by fewer quail game farms than red-legged partridge (84.1% [
19]) and wild rabbit (44% [
21]) farms that advise customers on how to release the animals; however, the number of quail game farms that offered this service was slightly higher than pheasant game farms (44% [
20]). These differences are probably due to the different techniques used when releasing these species [
9,
14]. The proportion of quail game farms that have their own hunting preserves, or are associated with a hunting preserve that satisfies the customers’ demands for intensive shoots that use the quails produced by the farm (
Table 7), is similar to that of red-legged partridge farms (36.5% [
19]), lesser than that of pheasant farms (52% [
20]), and greater than that of wild rabbit farms (9.5% [
21]).
Compared with other game farming sectors in Spain (73.0% of red-legged partridge [
19], 64.0% of pheasant [
20], and 76.2% of wild rabbit [
21] farms), the surveyed quail farms have a lower percentage in terms of commercialisation on a nationwide scale (
Table 8), being the quail market more restricted to the nearby local and regional areas. This is possibly due to the fact that many quail game farms are located in geographical environments where the demand for birds for release is highest (
Table 1). Regarding trade exports (
Table 8), the values obtained for quail game farms are similar to those obtained for red-legged partridge [
19] and wild rabbit [
21] farms in previous studies reporting that one third of those farms were also able to export their game products mainly to bordering countries such as Portugal and France. However, only 12% of pheasant game farms had ever exported birds [
20]. The export of quails to Portugal and France only is possibly due to the limitations on travel times established by European Union legislation in order to ensure the welfare of livestock during transportation [
45], which makes it inoperative to ship them further afield.
The creation and maintenance of a business website appears to be the main promotion channel used by quail game farms in Spain (
Table 9), probably due to its relatively low cost [
46] compared with other classical promotion activities. The increase in the use of this promotional channel has been significant compared with previous research results in other game farming sectors in Spain (44.4% in red-legged partridge farms [
19], 64.0% in pheasant farms [
20], and 38.1% in wild rabbit [
21] farms). In an environment in which communications and commerce through the Internet are widespread tools in business, the hunting sector has a long way to go in order to take advantage of the use of said websites as a marketing tool. Websites facilitate the transmission of a corporate image differentiated from competitors, and they also transmit information on the characteristics of the product offered to those in the hunting sector. In this sense, well-prepared and well-managed websites allow game farms to gain a competitive advantage in a market that sells animals for release in hunting preserves, a market that faces increasing levels of competition [
47]. Promotion via attending livestock and game fairs was another of the preferred ways to promote the quail game farms and sell their products (
Table 9); the popularity of this promotional activity has also increased when compared with other previous studies in related game sectors (20.6% in red-legged partridge farms [
19], 44.0% in pheasant farms [
20], and 19.1% in wild rabbit [
21] farms). On the contrary, advertising their products and services in the hunting press (
Table 9) has lost much relevance in quail game farms compared with what was described a few years ago for red-legged partridge (66.7% [
19]), pheasant (56% [
20]), and wild rabbit (42.9% [
21]) farms. All other promotional and advertising channels were irrelevant (
Table 9).