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| Mcfarland, Katherine; Soudant, Philippe; Jean, Frederic; Volety, Aswani K.. |
| Understanding the population dynamics of invasive species, such as the green mussel Perna viridis (Linnaeus, 1758), can aid in explaining the success of newly introduced populations and help predict the potential for spread. During a two-year field study of established populations in the invaded region of southwest Florida, year round gametogenesis and continuous spawning capabilities were observed through histological analysis of mussels collected monthly. This was supported by overall stable energetic reserves as measured through proximal biochemical composition (protein, glycogen and lipid content). However, egg outputs in the summer (6.4 x 10(6) +/- 2.6 x 10(6) eggs / female) were significantly higher than egg outputs of winter-spawned mussels (7.7 x... |
| Tipo: Text |
Palavras-chave: Gametogenesis; Protein; Glycogen; Lipid; Induced spawning. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00616/72842/72974.pdf |
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| Buzollo,Hellen; Veríssimo-Silveira,Rosicleire; Oliveira-Almeida,Isângela R.; Alexandre,Juliana S.; Okuda,Hélio T.; Ninhaus-Silveira,Alexandre. |
| The fish embryonic development comprises the events between the egg fertilization up to larvae hatching, being useful for the identification of viable eggs in productivity and survival studies as well as in raising experiments of several species. The goal of the present study was to characterize the embryonic development of Pimelodus maculatus (Siluriformes; Pimelodidae). The embryogenesis was typical of teleosteans, but with differences in relation to other species such as duration of development, type of blastocoel, moment of somite segmentation among others. Six stages of embryonic development were defined: zygote, cleavage, blastula, gastrula, organogenesis (divided in phases: early segmentation and late segmentation) and hatching with a period of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryonic development; Induced spawning; Morphology; Yolk syncyctial layer. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300013 |
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| Isler,Iván Valdebenito. |
| This work presents a conceptual analysis of the main biotechnologies used in Chilean salmoniculture, which is based on the production of Atlantic salmon (Salmo salar, 356.407 t),silver salmon or coho (Oncorhynchus kisutch, 116.481 t), (O. tshawytscha, 2.062 t) and rainbow trout (O. mykiss, 189.178 t).These activities are focused on the photoperiod artificial manipulation to obtain out-of-season spawning, in the use of hormonal therapies which allow synchronizing the final oocyte maturation (FOM) and sexual maturity acceleration or the increase in milt volume produced by males. Such actions are carried out using GnRHa in doses close to 10 µg/kg of fish. Once sexual maturity is reached, in vitro manipulation of gamets must often be done due to either the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biotechnology; Induced spawning; Photoperiod; Reproduction; Sex manipulation; Thermoperiod. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300004 |
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