Morphometric changes and sex steroid levels during the annual reproductive cycle of the Lusitanian toadfish, Halobatrachus didactylus

Modesto, Teresa; Canário, Adelino V.M.

doi:10.1016/s0016-6480(03)00027-3

Cited by 76 publications

(102 citation statements)

References 48 publications

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“…Class B and C were only represented by type I males, with B-sized animals ranging in MW from 100 to 148 mm (mean = 120.4 mm) and TL from 326 to 452 mm (mean = 387 mm) and C males ranging in MW from 150 to 195 mm (mean = 164.1 mm) and TL from 410 to 495 mm (mean = 452 mm). The fact that larger Wsh (B and C) were only represented by parental males (type I) is consistent with previous studies carried out with Iberian Lusitanian toadWsh populations (Palazón-Fernández et al 2001;Modesto and Canário 2003).…”

Section: Cais Do Seixalinhosupporting

confidence: 92%

“…Ripe females are attracted to the males by the low-frequency advertisement calls (boatwhistles in toadWshes and hums in midshipmen) that result from the contraction of sound-producing muscles attached to the swimbladder (Skoglund 1961;Bass and McKibben 2003). Females are known to lay a single batch of eggs on the roof of a nest and depart soon after spawning is completed (Modesto and Canário 2003;Sisneros et al 2009). Parental males continue calling to attract more females until the nest substrate is fully covered with multiple clutches.…”

Section: Introductionmentioning

confidence: 99%

“…This species presents an alternative mating strategy with a second male morphotype (type II males) that sneak egg fertilizations but does not defend nests or court females acoustically. Type I males are larger in body size and invest in sonic muscles and associated neural circuitry for acoustic communication used in courtship and agonistic interactions whereas type II males are smaller and mainly invest in producing larger testes (Bass 1996;Modesto and Canário 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Females release a low number (hundreds) of large eggs (5-8 mm diameter) (Palazón-Fernández et al 2001;Costa 2004) in a single batch (Modesto and Canário 2003) whose high survival is assured through male parental care. The spawning season extends from March to August with a peak in May-June in the Bay of Cádiz, Southern Spain (Palazón-Fernández et al 2001), but in Portugal it extends from May to July (Modesto and Canário 2003;Costa 2004). The main constraint for reproduction in H. didactylus, as in other batrachoidids, is water temperature, and breeding activity is only observed with temperatures higher than 18/19°C (Costa 2004).…”

Section: Introductionmentioning

confidence: 99%

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Patterns of shelter usage and social aggregation by the vocal Lusitanian toadfish

et al. 2009

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In some marine Wshes, males migrate from deeper to littoral water to breed, where they defend nests and provide parental care. In this study, we describe seasonal patterns of shelter occupation in estuarine shallow waters and assess social aggregation in the Lusitanian toadWsh (Batrachoididae), a vocal species with male parental care. Occupation of intertidal shelters was restricted to the breeding season but adult Wsh remained in subtidal regions during the non-reproductive season and they produced sounds throughout the year. Intertidal shelters were aggregated with up to Wve shelters found per 2-m segment of an 80-m transect. This aggregation probably resulted from social attraction since many segments were found unoccupied. Moreover, shelters contained on average two Wsh (maximum of nine). Based on size, shelters with multiple Wsh seemed to contain females, or possibly sneakers, but also more than one type I male inside, indicating a high social tolerance for conspeciWcs.

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Section: Cais Do Seixalinhosupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Patterns of shelter usage and social aggregation by the vocal Lusitanian toadfish

et al. 2009

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“…Breeding males build nests under rocks in shallow water and attract females to spawn with long advertisement calls (boatwhistles) from May to July, forming conspicuous choruses (dos Santos et al 2000;Amorim et al 2006). Females show low fecundity since they lay only a few hundreds of large eggs in a single batch on the roof of a nest (Modesto and Canário 2003;Costa 2004) whose survival is assured through male parental care.…”

Section: Study Speciesmentioning

confidence: 99%

Stereotypy and variation of the mating call in the Lusitanian toadfish, Halobatrachus didactylus

Amorim

Simões

Almada

et al. 2010

Behav Ecol Sociobiol

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Signal attributes should show different degrees of variability depending on the information to be conveyed. Species identity is usually associated with stereotyped features of a signal, whereas other types of information such as individual quality and motivation are associated with signal plasticity. Lusitanian toadfish males form aggregations during the breeding season and emit a tonal advertisement call (the boatwhistle) to attract mates to their nests. We test the hypothesis that the boatwhistle can convey information both on individual identity and motivation by checking how signal parameters vary with time. We study how the physical (tide level) and social (calling alone or in a chorus) environments and male calling rate affect this advertisement signal and how all these external and internal factors (environment, social and male motivation) blend to modulate the Lusitanian toadfish's advertisement call. Boatwhistles of each male were very stereotyped in short periods of time (minutes), but intra-male signal variability greatly increased in a longer time scale (days). Nevertheless, significant differences among males could still be found even in a long time scale. Pulse period was the acoustic feature that most contributed to discriminate among males. Tide level and male calling rate modulated boatwhistle characteristics, and there was a differential effect of tide on call attributes depending on male calling rate. Social acoustic environment only affected calling rate. These results suggest that inter-individual differences in call characteristics and call plasticity may mediate both malemale assessment and mate choice.

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Looking beyond the ordinary: Genital lupus

Jolly

Patel

2006

Arthritis & Rheumatism

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Morphometric changes and sex steroid levels during the annual reproductive cycle of the Lusitanian toadfish, Halobatrachus didactylus

Cited by 76 publications

References 48 publications

Patterns of shelter usage and social aggregation by the vocal Lusitanian toadfish

Patterns of shelter usage and social aggregation by the vocal Lusitanian toadfish

Stereotypy and variation of the mating call in the Lusitanian toadfish, Halobatrachus didactylus

Looking beyond the ordinary: Genital lupus

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