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Fishes, Volume 4, Issue 3

September 2019 - 13 articles

Cover Story: Beginning in 2002, New Zealand’s National Institute of Water and Atmospheric Research (NIWA) established a breeding program for the wreckfish (Polyprion oxygeneios), locally known as ‘hāpuku’. Wild-caught hāpuku spawn readily in captivity, but although first filial (F1) hāpuku complete vitellogenesis, females fail to undergo oocyte maturation and spawn or produce poor-quality eggs. We examined whether administration of a synthetic agonist of gonadotropin-releasing hormone (GnRHa) could improve F1 hāpuku spawning in captivity. This study successfully achieved two key aims: induction of spawning with GnRHa and closing of the life-cycle of hāpuku by producing second generation offspring. View this paper.

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Article

5 Citations

4,217 Views

14 Pages

Age, Growth, and Natural Mortality of Graysby, Cephalophilis cruentata, from the Southeastern United States

Michael L. Burton,
Jennifer C. Potts,
Andrew D. Ostrowski and
Kyle W. Shertzer

Fishes2019, 4(3), 36;https://doi.org/10.3390/fishes4030036

27 June 2019

Graysby (Cephalophilis cruentata) (n = 1308) collected from the southeastern United States Atlantic coast from 2001 to 2016 were aged using sectioned sagittal otoliths. Opaque zones formed February to June (peaking in April). Ages ranged from 2 to 21...

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Article

6 Citations

4,352 Views

14 Pages

The Dietary Lipid Content Affects the Tissue Gene Expression of Muscle Growth Biomarkers and the GH/IGF System of Pejerrey (Odontesthes bonariensis) Juveniles

Pedro Gómez-Requeni,
Mauricio Nestor Kraemer and
Luis Fabián Canosa

Fishes2019, 4(3), 37;https://doi.org/10.3390/fishes4030037

27 June 2019

Gene expression of growth hormone receptors (GHRs), insulin-like growth factors (IGFs), myostatin (MSTN) and myogenin (MyoG) was analyzed in juveniles pejerrey fed with graded levels of lipids (L): 6% (L6), 10% (L10), 25% (L25). After 14 weeks, no ch...

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Article

30 Citations

7,470 Views

16 Pages

Housefly (Musca domestica) Larvae Preparations after Removing the Hydrophobic Fraction Are Effective Alternatives to Fish Meal in Aquaculture Feed for Red Seabream (Pagrus major)

Atsushi Hashizume,
Atsushi Ido,
Takashi Ohta,
Serigne Thierno Thiaw,
Ryusaku Morita,
Munenori Nishikawa,
Takayuki Takahashi,
Chiemi Miura and
Takeshi Miura

Fishes2019, 4(3), 38;https://doi.org/10.3390/fishes4030038

27 June 2019

Insects are an attractive alternative to fish meal (FM) as a sustainable protein source in aquaculture feed that does not negatively impact the marine ecosystem. Despite housefly (Musca domestica) larvae having adequacy of amino acid profiles, they h...

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