Influence of tidal variation on reproductive timing

Morgan, Steven G.

doi:10.1016/s0022-0981(96)02606-8

Cited by 42 publications

(25 citation statements)

References 17 publications

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“…Similar hierarchies of rhythms have been proposed for 3 other Gulf coast crabs (Sesarma cinereum, Panopeus simpsoni, Panopeus obesus) that share this reproductive timing pattern (Morgan 1996). Four other Gulf coast crabs (Eurypanopeus depressus, Sesarma reticulatum, Dyspanopeus texana, Dissodactylus mellitae) released larvae near maximum amplitude high tides in broad daylight, even though larvae hatched in darkness on the Atlantic coast, suggesting that a different hierarchy of rhythms regulates reproductive timing by these crabs (Morgan 1996).…”

Section: Hierarchies Of Rhythms Regulating Reproductive Timingsupporting

confidence: 64%

Plasticity in reproductive timing by crabs in adjacent tidal regimes

Morgan¹

1996

Mar. Ecol. Prog. Ser.

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Tidal variation may cause reproductive timing by fiddler crabs Uca pugilator (Bosc) to vary geographically and seasonally. Fiddler crabs in a semidlurnal tidal regime along the Atlantic coast of the USA were previously shown to release larvae synchronously during maximum a m p l~t u d e evening high tides near new and full moons throughout the reproductive season. In the present study, fiddler crabs in a diurnal tldal regime on the Gulf coast of the USA released larvae during internledlate amplitude flood tldes near dawn regardless of lunar phase throughout most of the reproductive season. Late in the summer, peak larval release occurred near maximum amplitude high tides as on the Atlantic coast. In a mixed semidlurnal tidal regime on the Gulf coast, peak larval release by flddler crabs occurred during Intermediate amplitude high tldes near dawn, but biweekly period~city was weak late in the reproductive season. Intraspecific variation in reproductive timing arose because nocturnal maximum high tides dld not occur along the Gulf coast during most of the summer, but these tides returned during late summer In the diurnal tidal regime. Reproductive timing changed concomitantly with changing phase relationships of tides with light-dark and lunar cycles. Variation in reproductive timiny is phenotypic because crabs thdt were translocated reciprocally between diurnal and mixed semidiurnal tidal regimes entrained to the timing patterns of local crabs. A hierarchy of rhythms regulating reproductive timing was revealed by the degree to which larval release kept phase with lunar, tidal amplitude, tidal and light-dark cycles. These hierarchies enabled crabs to trnck phase shifts of cycles in variable tidal environments and may enhance mcdn reproductive succrss throughout the range of the specles

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Section: Hierarchies Of Rhythms Regulating Reproductive Timingsupporting

confidence: 64%

Plasticity in reproductive timing by crabs in adjacent tidal regimes

Morgan¹

1996

Mar. Ecol. Prog. Ser.

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“…Dos representantes da família Ocypodidae, a maioria dos artigos têm abordado a descrição morfológica completa dos estágios larvais (DIAZ & COSTLOW 1972, RODRIGUES & HEBLING 1989, ANGER et al 1990) ou os processos de liberação e dispersão larval (BERGIN 1981, KELLMEYER & SALMON 2001. Segundo MORGAN (1996), as marés regulam o processo de liberação larval, atuando em sinergia com o padrão de distribuição espacial da espécie. Segundo este autor, a liberação das larvas de caranguejos de mangue pode ocorrer no interior das galerias em espécies que vivem mais próximo da margem ou dos canais d'água, não necessitando realizar uma migração para este fim, a exemplo do que ocorre com as espécies de maior grau de terrestrialidade.…”

Section: Discussionunclassified

“…Segundo este autor, a liberação das larvas de caranguejos de mangue pode ocorrer no interior das galerias em espécies que vivem mais próximo da margem ou dos canais d'água, não necessitando realizar uma migração para este fim, a exemplo do que ocorre com as espécies de maior grau de terrestrialidade. Essas diferenças espaciais no "timing" reprodutivo podem ser geneticamente determinadas ou fenotipicamente impostas pelo ambiente (MORGAN 1996).…”

Section: Discussionunclassified

“…Geralmente, os peixes de recifes de corais e várias espécies de caranguejos liberam suas larvas no período noturno, durante os dias de lua nova/cheia, que apresentam as maiores amplitudes de maré (MORGAN 1996). Corroborando o presente estudo, MORGAN & CHRISTY (1995) verificaram que os caranguejos semiterrestres apresentam preferência pela liberação larval durante o período noturno, que pode ser considerada uma adaptação reprodutiva visando minimizar a predação larval, haja visto que a maioria dos peixes planctotróficos apresentam maior atividade diurna (KELLMEYER & SALMON 2001).…”

Section: Discussionunclassified

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Fertilidade do caranguejo de mangue Ucides cordatus (Linnaeus) (Crustacea, Brachyura, Ocypodidae), em Iguape (São Paulo, Brasil)

Hattori

Pinheiro

2003

Rev. Bras. Zool.

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“…The tlming of larval release may best be determined by holding ovigerous crabs in the laboratory or in boxes anchored in the field (Christy 1986, Morgan & Christy 1994, Morgan 1996 rather than by sampling plankton. Of the 3 species held in the laboratory during our study, Sesarma reticulatum released larvae most synchronously relative to the tidal amplitude cycle, but this trend was marginally nonsignificant (p = 0.07) in Flax Pond.…”

Section: Feeding Preferences Of Planktivorous Fishesmentioning

confidence: 99%

Planktivory as a selective force for reproductive synchrony and larval migration

Hovel¹,

Morgan²

1997

Mar. Ecol. Prog. Ser.

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Diurnally foraging planktivorous fishes are exceptionally dense in marshes worldwide, and larvae of most species of marsh crabs largely may escape predation in time and space by hatching during nocturnal maximum amplitude high tides (NMAHT) when they are rapidly transported to deeper waters under the cover darkness. Species that have long spines or other well-developed larval defenses may be less constra~ned to release larvae during this safe period. Three species of diurnally foraging planktivorous fishes (Menldja menidia, Fundulus heteroclitus, F. ma~alis) were very abundant and comprised nearly all of the fishes collected in Flax Pond salt marsh In New York, USA, during the summer of 1994. Four species of crabs (Sesarma retjculatum, Uca pugnax. U. pugdator, Dyspanopeus say13 also were abundant there and released larvae from mid J u n e to September. These crabs did not release larvae randomly, rather larval release peaked during NMAHT when strong e b b tides transported 97.7 of the larvae from the marsh by the follo\ving day. Larvae that were released during nocturnal minimum amplitude high tides were transported from the marsh less effectively (84.5",4). Only 0.37 % of larvae remained in the marsh following the molt to the second instar. Larval release by D. say1 was weakly synchronized with the tidal amplitude cycle, and these larvae were transported from the marsh least effectively. Although D. say1 larvae that were released during NMAHT were transported from the marsh nearly as effectively as were the other species (95.6% vs 98.0% of S. reticulatum and 99.9% of Uca spp.). more of them were released near nocturnal minimum amplitude high tide when transport was least effective (58.2% vs 86.0",, of S. retfculatum and 87.5% of Ucd spp.). Transport of D. sayilarvae from the marsh may have been slowed further by the tidal vertical migrations undertaken by these larvae. In feeding trials conducted in the marsh, M, menidia and E heteroclitus ate about half as many newly released D, sayi larvae as S. rehculatum and U, pugnax larvae (57.2% vs 26 1 % of S. reticulatum and 32.9% of U. pugnax). Long spines may have deterred predation on D sayilarvae and may reduce selection for rapid transport of these larvae from the marsh. Recruitment to Flax Pond occurred during flood tides, especially strong flood tides, at night when transport to adult habitats was maximal and predation by fishes was minimal. Megalopae of all study species recruited regularly in the same relative proportions that they were released throughout the entire reproductive season, even though larvae of some of the study species (S. reticulatum, D. say^) likely develop entirely in adjacent Long Island Sound whereas others (Uca spp.) disperse through the sound and onto the continental shelf. This suggests that reproductive and larval behaviors largely overcame mortality during the planktonic phase of the life cycle and coupled production to recruitment, regardless of whether or not recruits primarily originated from local populations. Thus, pred...

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Influence of tidal variation on reproductive timing

Cited by 42 publications

References 17 publications

Plasticity in reproductive timing by crabs in adjacent tidal regimes

Plasticity in reproductive timing by crabs in adjacent tidal regimes

Fertilidade do caranguejo de mangue Ucides cordatus (Linnaeus) (Crustacea, Brachyura, Ocypodidae), em Iguape (São Paulo, Brasil)

Planktivory as a selective force for reproductive synchrony and larval migration

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