...uture evolutionary potential of the entire species (Pearse & Avise 2001; Avise et al. 2002; Frankham et al. 2002; Rowe & Hutchings 2003). Given that the current level of shark exploitation worldwide is far exceeding the reproductive capacity of many species and resulting in serious declines in some populations (Manire & Gruber 1990; Baum et al. 2003; Myers & Worm 2003), development of urgently needed and effective conservation measures will benefit from a more thorough understanding of shark mating systems. Field observations suggest that group reproductive behaviour and polyandrous copulations by females in a single mating event may be common in some sharks and batoids (Carrier et al. 1994; Yano et al. 1999; Pratt & Carrier 2001; Chapman et al. 2003). Several species of requiem and hammerhead sharks (families Carcharhinidae and Sphyrnidae, respectively) are also known to store sperm for several months after copulation, raising the possibility that viable sperm from multiple males can accumulate over a protracted mating season and be available for delayed fertilization (Pratt 1993; Manire et al. 1995). Despite these life-history strategies that might seem conducive to multiple paternity, the latter has been documented in only two shark species, the lemon Negaprion brevirostris and nurse shark Ginglymostoma cirratum. In both these cases, the study animals were from small populations (< 100 breeding animals) and sampled from a single location from insular breeding grounds in the...
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...62118 0/nm 1/n1 2/nm 3/nm 4/nm 5/nm 6/nm 7/nm 8/nm 9/nm 1990s 0th/pt 1st/p 1th/tc 2nd/p 2th/tc 3rd/p 3th/tc 4th/pt 5th/pt 6th/pt 7th/pt 8th/pt 9th/pt 0s/pt a A AA AAA Aachen/M aardvark/SM Aaren/M Aarhus/M Aarika/M Aaron/M AB aback abacus/SM abaft Abagael/M Abagail/M abalone/SM abandoner/M abandon/LGDRS abandonment/SM abase/LGDSR abasement/S abaser/M abashed/UY abashment/MS abash/SDLG abate/DSRLG abated/U abatement/MS abater/M abattoir/SM Abba/M Abbe/M abbé/S abbess/SM Abbey/M abbey/MS Abbie/M Abbi/M Abbot/M abbot/MS Abbott/M abbr abbrev abbreviated/UA abbreviates/A abbreviate/XDSNG abbreviating/A abbreviation/M Abbye/M Abby/M ABC/M Abdel/M abdicate/NGDSX abdication/M abdomen/SM abdominal/YS abduct/DGS abduction/SM abductor/SM Abdul/M ab/DY abeam Abelard/M Abel/M Abelson/M Abe/M Aberdeen/M Abernathy/M aberrant/YS aberrational aberration/SM abet/S abetted abetting abettor/SM Abeu/M abeyance/MS abeyant Abey/M abhorred abhorrence/MS abhorrent/Y abhorrer/M abhorring abhor/S abidance/MS abide/JGSR abider/M abiding/Y Abidjan/M Abie/M Abigael/M Abigail/M Abigale/M Abilene/M ability/IMES abjection/MS abjectness/SM abject/SGPDY abjuration/SM abjuratory abjurer/M abjure/ZGSRD ablate/VGNSDX ablation/M ablative/SY ablaze abler/E ables/E ablest able/U abloom ablution/MS Ab/M ABM/S abnegate/NGSDX abnegation/M Abner/M abnormality/SM abnormal/SY aboard ...
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