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Combined effects of temperature-salinity on larval survival of the Eastern oyster Crassostrea virginica in the Maryland portion of the Chesapeak Bay (USA) ArchiMer
Goulletquer, Philippe; Heral, Maurice; Prou, Jean.
Oyster landings in the Maryland portion of the Chesapeake Bay have declined by more than 50fold since the early part of the century, despite intensive management efforts. The annual shell repletion program is the most critical programmatic element to effect recovery of the ailing Eastern oyster Crassotrea virginica stock and fishery. The overall efficacy of shell repletion management depends primarily on the success of spat settlement on the planted shell, and furthermore on their survival rate. The Operations Research techniques and mathematical programming developed by Rothschild et al. (1991) attempt to maximize spat recruitment to the oyster stock subject to a series of operational constraints. Allocation and timing of shell deployment are the most...
Tipo: Text Palavras-chave: Larval; Settlement; USA; Chesapeake Bay; Crassotrea virginica; Oysters.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3074.pdf
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Carcinization in the Anomura – fact or fiction? II. Evidence from larval, megalopal and early juvenile morphology Naturalis
McLaughlin, Patsy A.; Lemaitre, Rafael; Tudge, Christopher C..
In this second of a two-part series, carcinization in the Anomura has been reviewed from early juvenile, megalopal, and larval perspectives. Data from megalopal and early juvenile development in ten genera of the Lithodidae have provided unequivocal evidence that earlier hypotheses regarding evolution of the king crab pleon were erroneous. A pattern of sundering, and decalcification has been traced from the megalopal stage through several early crabs stages in species of Lithodes and Paralomis, with supplemental evidence from species in eight other genera. Of major significance has been the attention directed to the marginal plates of the second pleomere, which when separated in lithodids are not homologous with the adult so-called “marginal plates” of the...
Tipo: Article / Letter to the editor Palavras-chave: Carcinization; Anomura; Paguroidea; Lithodidae; Paguridae; Lomisidae; Porcellanidae; Larval; Megalopal and early juvenile morphology; Pleonal tergites.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/534278
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