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  • 1
    Electronic Resource
    Electronic Resource
    The reproductive biology of the crystal goby with a comparison to that of the transparent goby (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish biology 62 (2003), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A histological analysis of the gonad of the pelagic crystal goby Crystallogobius linearis, from the coastal central area of the Adriatic Sea, showed it to be a truly semelparous species; after the first spawning the mature gonads of both males and females appeared to have lost the capability for further spawning. Mature females had very low fecundity (200–700 mature oocytes) and small egg size (0·2–0·55 mm) similarly to other progenetic species. This reproductive strategy is compared with that of Aphia minuta, and a possible cause for the post-reproductive mortality of the two gobies is suggested and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1095-8649.2003.00031.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pattern of gonad maturation and the question of semelparity in the paedomorphic goby Aphia minuta (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 58 (2001), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: At variance with previous reports, the paedomorphic goby Aphia minuta does not show semelparity, but abbreviate iteroparity like other small Mediterranean gobiid species. In spring, the mature ovary contains several batches of eggs at different stages of vitellogenesis. This indicates that the breeding season of A. minuta is quite long and that spawning takes place at least twice during its short lifespan, involving in each ovulatory wave different batches of oocytes which undergo vitellogenesis at different times. These observations agree with the testicular cycle data. In males, which in spring exhibit active spermiation coinciding with deposition of the first batch of oocytes, spermatogonial mitosis also resumes, eventually resulting in the production of new sperm in summer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00520.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Short lifespan and apoptosis in Aphia minuta (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 60 (2002), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Evidence is presented that apoptosis of intestinal enterocytes is implicated in adult mortality immediately after the breeding season in Aphia minuta, a paedomorphic goby that spends its whole life cycle of 〈1 year in the water column as a pelagic and planktophagous fish. This could be the first documented case in which apoptosis triggers a population dynamic process such as natural mortality in a vertebrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2002.tb01703.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Reproductive cycle and sex inversion in razor fish, a protogynous labrid in the southern Mediterranean Sea (2004)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    Journal of fish biology 64 (2004), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The reproductive biology of the Mediterranean razor fish Xyrichthys novacula was investigated by demographic data and histological analysis of the female, intersexual and male gonads. Specimens were collected by bottom trawl on a monthly basis between June 2000 and July 2001 in a sandy bay in southern Thyrrenian. Gonad histology confirmed that the Mediterranean razor fish is a monandric, protogynous hermaphrodite. Females reached first sexual maturity at 100 mm (LT) and the estimated mean LT at first maturity (L50) was 125 mm. Females exhibited asynchronous ovarian development and multiple ovulations occurred over the spawning period. Vitellogenesis started in early May and spawning occurred from late May until late September. Sexual transition involved a large-scale atresia of all oocyte stages and a massive degeneration of ovarian tissue followed by primordial germ cells proliferation. Sex change began at spawning time (June) but transitional individuals tended to cluster at the end of the reproductive period (September). They accounted for 17·1% of the population sampled and were found in a broad size range (105–150 mm LT).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0022-1112.2004.0404.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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