Size-Dependent Rate of Protogynous Sex Change in the Pomacanthid Angelfish, Centropyge potteri

Lutnesky, Marvin M. F.

doi:10.2307/1446961

Cited by 21 publications

(13 citation statements)

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“…In protogynous Centropyge potteri and Thalassoma duperrey, the body size difference in female pairs did not influence sex change of the larger female (Ross et al, 1983;Lutnesky, 1996), consistent with Cephalopholis boenak. In Centropyge potteri and Coryphopterus personatus, however, the rate of sex change of the larger female was influenced by its absolute body size; females with larger body size changed sex faster than smaller ones (Cole & Robertson, 1988;Lutnesky, 1996). Therefore, when the absolute body size of the larger female only just exceeds the minimum size of female sexual maturation, sex change may be slow, or may not occur at all (Lutnesky, 1996).…”

Section: Adult Sex Changesupporting

confidence: 53%

The influence of social factors on adult sex change and juvenile sexual differentiation in a diandric, protogynous epinepheline, Cephalopholis boenak (Pisces, Serranidae)

Liu

Sadovy

2004

Journal of Zoology

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Adult sex change and juvenile sexual differentiation in the protogynous epinepheline Cephalopholis boenak were demonstrated in captivity to be influenced by social factors. Adult sex change in C. boenak occurred in two directions, female to male and male to female. The presence or absence of a larger male plays an important role in adult female sex change; female(s) did not change sex in the presence of a larger male, but sex change occurred after the removal of the larger males in the same social groups. In male pairs, either the larger or the smaller male changed sex. Male to female sex change has not been reported previously in Cephalopholis, and only rarely in epinephelines. This is the first report of direct male sexual differentiation from juveniles (i.e. primary male development), through manipulating the number of juveniles, in a protogynous epinepheline. All isolated, single, juveniles differentiated directly as males, and male to female sex ratios did not differ significantly from 1:1 in all experimental social groups of two to four juveniles. Differentiating males grew significantly faster than differentiating females and undifferentiated juveniles during the 57-week experimental period. The role of growth rate in sex determination in C. boenak is not known but clearly plays a part in juvenile sexual differentiation and merits further investigation. Social factors influencing bi-directional adult sex change and juvenile sexual differentiation are a reflection of plasticity of sexual expression in C. boenak, in particular, and the Serranidae in general.

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Section: Adult Sex Changesupporting

confidence: 53%

The influence of social factors on adult sex change and juvenile sexual differentiation in a diandric, protogynous epinepheline, Cephalopholis boenak (Pisces, Serranidae)

Liu

Sadovy

2004

Journal of Zoology

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“…In the heavily fished Mycteroperca microlepis (Goode & Bean), for example, adult sex ratios changed from 20 to 2% male, with the very real concern of severe curtailment of reproductive potential through insufficent males (sperm), despite sufficient female biomass . In the angelfish Centropyge potteri (Jordan & Metz), density and minimum female size constrain sex change (Lutnesky, 1994(Lutnesky, , 1996 while in a protogynous sparid, the red porgy Pagrus pagrus (L.), the SPR fell below 1% and the population collapsed despite the continued presence of adult females (Huntsman et al, 1995(Huntsman et al, , 1999. Lopholatilus chamaeleonticeps (Goode & Bean) is not hermaphroditic but has a complex mating system.…”

Section: Evidence For Depensationmentioning

confidence: 99%

The threat of fishing to highly fecund fishes

Sadovy

2001

Journal of Fish Biology

132

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The last decade has witnessed a growing awareness that fishes can not only be severely overfished but could also be threatened with extinction through over-exploitation. Among commercially important species, those particularly at risk are large and slow to mature, iteroparous and may have sporadic recruitment. The threat of extirpation or extinction may be greater if species are particularly valuable, have a limited geographical range, are part of mixed-species fisheries, or are distributed solely within areas of intense fishing activity. Significantly, there is little empirical or theoretical basis for hypothesizing that highly fecund species are any less at risk than those of low fecundity, as is often assumed. Indeed, the use of fecundity in estimating reproductive output in long-lived, highly fecund, pelagic egg-producing species, may be deeply flawed. A general resistance to accepting that fecund marine fishes could become endangered through exploitation stems from poor understanding of population dynamics, especially in the early post-settlement phase, coupled with assumptions of fishery models that ignore critical components of life history theory. Moreover, faith in the ability to manage exploited species effectively leads to the perception that severe declines are management, rather than conservation, issues. The growing list of threatened marine species and a realization of the many factors that place them at risk indicate the need to be precautionary about the possibility of extinction, and about the criteria used to assess such risk, with important implications for research, monitoring and management. 2001 The Fisheries Society of the British Isles

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“…Allen (1979, p. 314) wrote: 'Most of the butterflyfishes and angelfishes that are known to hybridize belong to solitary or pair-forming species.' While this may be true of many of the butterflyfish species and some of the larger pomacanthids, most species of Centropyge form harems comprised of a single male and from two to seven or more females (Moyer & Nakazono 1978, Moyer 1990, Lutnesky 1992a.…”

Section: Factors Favoring Hybridizationmentioning

confidence: 99%

“…Lutnesky (1992a) investigated the mating behavior of Centropygepotteri in Hawaii. He found this species to be haremic and proposed a 'Temporal-Threshold Model of Polygynous Mating' (TMPM) to account for temporal patterns of spawning among different females within a harem (Lutnesky 1992a, b).…”

Section: Factors Favoring Hybridizationmentioning

confidence: 99%