An Atlas Of Reproductive Development In Rockfishes Genus Sebastes
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An Atlas Of Reproductive Development In Rockfishes Genus Sebastes
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Author : Franklin R. Shaw
language : en
Publisher:
Release Date : 2012
An Atlas Of Reproductive Development In Rockfishes Genus Sebastes written by Franklin R. Shaw and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Sebastes categories.
The genus Sebastes consists of over 100 fish species, all of which are viviparous and long-lived. Previous studies have presented schemes on the reproductive biology of a single targeted species of the genus Sebastes, but all appear to possess a similar reproductive biology as evidenced by this and other studies. This atlas stages major events during spermatogenesis, oogenesis, and embryogenesis, including atresia, in six species of Sebastes (S. alutus, S. elongatus, S. helvomaculatus, S. polyspinis, S. proriger, and S. zacentrus). Our study suggests that the male reproductive cycle of Sebastes is characterized by 11 phases of testicular development, with 10 stages of sperm development and 1 stage of spermatozoa atresia. Ovarian development was divided into 12 phases, with 10 stages of oocyte development, 1 stage of embryonic development, and 1 stage of oocyte atresia. Embryonic development up to parturition was divided into 33 stages following the research of Yamada and Kusakari (1991). Reproductive development of all six species examined followed the developmental classifications listed above which may apply to all species of Sebastes regardless of the number of broods produced annually. Multiple brooders vary in that not all ova are fertilized and progress to embryos; a proportion of ova are arrested at the pre-vitellogenic stage. Reproductive stage examples shown in this atlas use S. elongatus for spermatic development, S. proriger for oocyte development, and S. alutus for embryological development, because opportunistic sampling only permitted complete analysis of each respective developmental phase for those species. The results of this study and the proposed reproductive phases complement the recommended scheme submitted by Brown-Peterson et al. (2011), who call for a standardization of terminology for describing reproductive development of fishes.
An Atlas Of Reproductive Development In Rockfishes Genus Sebastes
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Author : Franklin R. Shaw
language : en
Publisher:
Release Date : 2012
An Atlas Of Reproductive Development In Rockfishes Genus Sebastes written by Franklin R. Shaw and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Sebastes categories.
The genus Sebastes consists of over 100 fish species, all of which are viviparous and long-lived. Previous studies have presented schemes on the reproductive biology of a single targeted species of the genus Sebastes, but all appear to possess a similar reproductive biology as evidenced by this and other studies. This atlas stages major events during spermatogenesis, oogenesis, and embryogenesis, including atresia, in six species of Sebastes (S. alutus, S. elongatus, S. helvomaculatus, S. polyspinis, S. proriger, and S. zacentrus). Our study suggests that the male reproductive cycle of Sebastes is characterized by 11 phases of testicular development, with 10 stages of sperm development and 1 stage of spermatozoa atresia. Ovarian development was divided into 12 phases, with 10 stages of oocyte development, 1 stage of embryonic development, and 1 stage of oocyte atresia. Embryonic development up to parturition was divided into 33 stages following the research of Yamada and Kusakari (1991). Reproductive development of all six species examined followed the developmental classifications listed above which may apply to all species of Sebastes regardless of the number of broods produced annually. Multiple brooders vary in that not all ova are fertilized and progress to embryos; a proportion of ova are arrested at the pre-vitellogenic stage. Reproductive stage examples shown in this atlas use S. elongatus for spermatic development, S. proriger for oocyte development, and S. alutus for embryological development, because opportunistic sampling only permitted complete analysis of each respective developmental phase for those species. The results of this study and the proposed reproductive phases complement the recommended scheme submitted by Brown-Peterson et al. (2011), who call for a standardization of terminology for describing reproductive development of fishes.
An Atlas Of Reproductive Development In Rockfishes Genus Sebastes
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Author :
language : en
Publisher:
Release Date : 2012
An Atlas Of Reproductive Development In Rockfishes Genus Sebastes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Sebastes categories.
Rockfishes Of The Genus Sebastes
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Author : George W. Boehlert
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Rockfishes Of The Genus Sebastes written by George W. Boehlert and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Rockfishes Of The Genus Sebastes
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Author :
language : en
Publisher:
Release Date : 1991
Rockfishes Of The Genus Sebastes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Rockfishes Of The Genus Sebastes
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Author :
language : en
Publisher:
Release Date : 1991
Rockfishes Of The Genus Sebastes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Sebastes categories.
The Origin Evolution And Diversification Of Rockfishes Of The Genus Sebastes Cuvier
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Author : John R. Hyde
language : en
Publisher:
Release Date : 2007
The Origin Evolution And Diversification Of Rockfishes Of The Genus Sebastes Cuvier written by John R. Hyde and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Dispersal and speciation in the marine environment have long been key topics in evolutionary biology and more recently in conservation biology. The genus Sebastes, with approximately 110 species, is found throughout most of the world's cold-temperate seas. Their breadth of phenotypic and species diversity, ecological dominance, and importance to world fisheries has made them a focus of intensive study by countless researchers. In this dissertation, DNA sequence and microsatellite data were used to investigate patterns of speciation, distribution, and mating habits. In Chapter I, DNA sequence data from seven mitochondrial and two nuclear genes, were used to evaluate possible geographic origin, patterns and timing of dispersal, speciation patterns and drivers, and inter-species relationships. The data support a middle Miocene origin for Sebastes spp. in deep habitats of the Northwest Pacific followed by dispersal into the Northeast Pacific and eventually into the southern hemisphere, driven by progressive cooling and strengthening of major ocean currents. Previous hypothesized relationships, shown to be mostly poly- or para- phyletic, were revised in light of the findings. Chapter I provided evidence for two new "cryptic" species. In Chapter II, sequence of the mitochondrial cytochrome b gene, in combination with nine microsatellite loci, was used to evaluate the geographic and bathymetric range of the vermilion rockfish species complex, as well as test for reproductive isolation between the putative species. Genetic analyses supported the presence of two species, separated primarily by depth of adult occurrence. This finding, in association with distribution patterns of 12 recent species pairs, suggests a novel speciation mode based upon the loss/truncation of an ontogenetic migration phase. In Chapter III, DNA sequence data from Chapter II was used to evaluate patterns of population connectivity and gene flow within the vermilion rockfish. A range-wide analysis showed high levels of genetic heterogeneity, likely driven by limited larval dispersal and barriers to gene flow across major oceanographic features. Patterns of paternity and mating system were investigated in Chapter IV using microsatellite loci. Paternity analyses were performed on larvae from both captive and wild populations, representing most major lineages found in Chapter I. Ten of the 17 examined species, showed evidence for multiple sires within a single brood. The implications for genetic diversity produced by this polygynandrous mating system are discussed.
Rockfishes Of The Genus Sebastes
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Author :
language : en
Publisher:
Release Date : 1991
Rockfishes Of The Genus Sebastes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Sebastes categories.
An Assessment Of The Reproductive Cycle In Black Rockfish Sebastes Melanops Girard 1856 On The Central Oregon Coast
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Author : Brooke E. Martin-Mills
language : en
Publisher:
Release Date : 2007
An Assessment Of The Reproductive Cycle In Black Rockfish Sebastes Melanops Girard 1856 On The Central Oregon Coast written by Brooke E. Martin-Mills and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Sebastes categories.
Because of large declines in abundance of many Eastern Pacific rockfish populations (Genus Sebastes), there has been an increasing effort to improve our understanding of the role of spawning population characteristics and individual reproductive success in recruitment variability and population dynamics. Current methods for assessing sex and maturational status in rockfishes are lethal, so fishery managers would benefit from a non-lethal method to assess the reproductive potential of rockfish populations. I developed a biochemical assay to determine sex and stage of female maturity in black rockfish (Sebastes melanops) using a blood plasma indicator vitellogenin (VTG). The specific objectives of this research were to: 1) describe the annual hormonal and gonadal changes associated with reproduction and 2) describe the timing of reproduction in female black rockfish of different age classes. Estradiol-17[Beta] (E2) and VTG concentrations were compared with histologically determined ovarian stages of female maturity (i.e. pre-vitellogenic, early vitellogenic, mid-vitellogenic, post-vitellogenic, oocyte maturation, and post-spawned) from 325 female black rockfish sampled by hook-and-line from the central Oregon coast from September 2003 to January 2005. I also measured E2 and VTG in male fish from the same time period. VTG concentrations detected in field-collected blood samples reflected the seasonal cycle reported in previous studies. Mean concentrations of VTG in mid-vitellogenic, post-vitellogenic, and females undergoing oocyte maturation can be used to distinguish between pre-vitellogenic females and early vitellogenic females during the spawning season (P
Development Of Kelp Rockfish Sebastes Atrovirens Jordan And Gilbert 1880 And Brown Rockfish S Auriculatus Girard 1854 From Birth To Pelagic Juvenile Stage With Notes On Early Larval Development Of Black And Yellow Rockfish S Chrysomelas Jordan And Gilbert 1880 Reared In The Laboratory Pisces Sebastidae
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Author : William Watson
language : en
Publisher:
Release Date : 2004
Development Of Kelp Rockfish Sebastes Atrovirens Jordan And Gilbert 1880 And Brown Rockfish S Auriculatus Girard 1854 From Birth To Pelagic Juvenile Stage With Notes On Early Larval Development Of Black And Yellow Rockfish S Chrysomelas Jordan And Gilbert 1880 Reared In The Laboratory Pisces Sebastidae written by William Watson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Fish culture categories.