Modification of egg production and packaging in response to food availability by Nassarius pauperatus

McKillup, Steve; Butler, Alan

doi:10.1007/bf00344772

Cited by 45 publications

(15 citation statements)

References 14 publications

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“…This is not, however, the case for N. pauperatus from South Australia where the shell height of males is longer than that of females (McKillup and Butler 1979). The populations of N. festivus at the three study sites were female biased.…”

Section: Discussioncontrasting

confidence: 59%

The reproductive biology of Nassarius festivus (Powys, 1835) (Gastropoda: Nassariidae) in relation to seasonal changes in temperature and salinity in subtropical Hong Kong

Chan

Morton

2005

Aquat Ecol

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The reproduction of Nassarius festivus (Gastropoda: Nassariidae) has been studied on three contrasting beaches in Hong Kong. There was no significant difference in shell heights between females and males of N. festivus at three study sites and the sex ratio was always female biased. The highest female sex ratio was recorded from Starfish Bay, followed by Tai Tam Bay and then Tai Mong Tsai. The sexual cycle of N. festivus is completed in 1 year in Hong Kong. It is a winter spawner with a reproductive period ranging from September to May. The gonads progressively mature in autumn with maturity being achieved in winter. Spring and summer are times of gonadal decline and gametogenesis initiation, respectively. The ranges in water temperature and salinity at which mature individuals occur were 13.7-28.0°C and 19.3-29.0&, respectively. N. festivus produces between 16 and 46 eggsÁcapsule À1 . Over its short life span of 1.21 years, therefore, N. festivus attempts to maximize reproductive output. The eggs hatch as veligers which remain in the plankton for between 33 and 41 days. In terms of its reproductive biology, it is concluded that N. festivus behaves as a typical sub-tropical species with a mix of tropical and temperate characteristics seen in other nassariids from these latitudes.

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Section: Discussioncontrasting

confidence: 59%

The reproductive biology of Nassarius festivus (Powys, 1835) (Gastropoda: Nassariidae) in relation to seasonal changes in temperature and salinity in subtropical Hong Kong

Chan

Morton

2005

Aquat Ecol

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“…It has been shown for the marine gastropod Nassarius pauperatus that when trophic conditions deteriorate, egg and egg capsule production increase (McKillup & Butler 1979). Increased reproductive effort at the expense of somatic growth has also been shown for sea urchins (Thompson 1982) and fish (Hirshfield 1980).…”

Section: Discussionmentioning

confidence: 99%

“…Generally, fecundity is reduced with a reduced ration (Calow & Woollhead 1977, Bayne et al 1978, Townshend & Wootten 1984, although in some species it may be enhanced (McKillup & Butler 1979, Calow 1981. In other cases, although reduced fecundity has been demonstrated, reproductive effort (that is the proportion of acquired energy allocated for reproduction) has increased (Hirshfield 1980, Thompson 1982.…”

Section: Introductionmentioning

confidence: 99%

Seasonal cycles in and effects of starvation on egg development in Mytilus edulis

Pipe¹

1985

Mar. Ecol. Prog. Ser.

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Histological and quantitative cytochemical methods were used to investigate seasonal cycles in, and effects of starvation on, reproduction throughout the gametogenic cycle. Amount and compos~tion of egg cytoplasm in ripe oocytes was found to be variable throughout the season. There was an overall decline in amount of egg cytoplasm as the gametogenic cycle progressed. Eggs developing early in the season had high glycogen levels but low lipid levels; protein levels remained constant from December to May but then declined. Results of experiments showed that during the first half of the gametogenic cycle starvation resulted In an increase in production of ripe oocytes. There was also an increase in volume of egg reserves on starvation but glycogen and protein levels declined. Timing of the gametogenic cycle was delayed by starvation. There was variability in the activities of hydrolytic enzymes throughout the gametogenic cycle; however, starvation did not significantly affect levels of activity.

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“…Studies have demonstrated relationships between food quantity or quality and reproductive output in spionid polychaetes (Levin 1986, Grémare et al 1989, Levin 1991, Qian & Chia 1991 as well as other invertebrates (McKillup & Butler 1979, George et al 1990, George 1994. For example, Walker & Heffernan (1994) observed differences in time to spawning and gonad index with relation to level of tidal exposure of the northern quahog Mercenaria mercenaria.…”

Section: Food Availabilitymentioning

confidence: 99%

Influence of wave-induced disturbance on seasonal spawning patterns in the sabellariid polychaete Phragmatopoma lapidosa

McCarthy¹,

Young²,

Emson³

2003

Mar. Ecol. Prog. Ser.

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The effect of wave-induced disturbance on seasonal spawning patterns of the opportunistic polychaete Phragmatopoma lapidosa (Kinberg, 1867) was investigated by comparing seasonal fecundity, egg size and adult size between intertidal and subtidal worms at Boynton Beach, Florida. Fecundity patterns showed spawning peaks in summer and fall in both habitats, with reduced spawning in late fall and early winter. Subtidal females averaged 1015.2 eggs mm -1 body length (range 0 to 2000 eggs mm -1 ), while intertidal females averaged 607.4 eggs mm -1 (range 0 to 1520 eggs mm -1 ). Mean egg diameters were not significantly different between worms from the 2 habitats, ranging between 90.4 µm (SD = 3.7) and 89.5 µm (SD = 4.3) for intertidal and subtidal worms respectively. Inter-and intra-census comparisons of egg diameter, fecundity and adult length revealed few statistically significant relationships, suggesting that intertidal and subtidal worms were the same age. Adult lengths in both habitats did change seasonally. The smallest adult worms were found shortly after massive fall recruitment replaced a large percentage of individuals in both intertidal and subtidal populations. Stepwise multiple regression indicated that 76.2% of the variance in intertidal fecundity was explained by a negative correlation with wave height (40.4%), and a positive correlation with day length (34.7%). In contrast, 85.5% of the variance in subtidal fecundity was explained by a positive correlation with day length (77.4%), and a negative correlation with chlorophyll a concentration (8.1%). While habitat-specific differences in energy available for gametogenesis probably contribute towards the observed fecundity trends, the force of crashing waves could also influence fecundity, as it may affect frequency of spawning in intertidal but not subtidal habitats.KEY WORDS: Phragmatopoma · Polychaetes · Fecundity · Spawning · Reproductive plasticity Resale or republication not permitted without written consent of the publisher

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Modification of egg production and packaging in response to food availability by Nassarius pauperatus

Cited by 45 publications

References 14 publications

The reproductive biology of Nassarius festivus (Powys, 1835) (Gastropoda: Nassariidae) in relation to seasonal changes in temperature and salinity in subtropical Hong Kong

The reproductive biology of Nassarius festivus (Powys, 1835) (Gastropoda: Nassariidae) in relation to seasonal changes in temperature and salinity in subtropical Hong Kong

Seasonal cycles in and effects of starvation on egg development in Mytilus edulis

Influence of wave-induced disturbance on seasonal spawning patterns in the sabellariid polychaete Phragmatopoma lapidosa

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