Group-spawning and Simultanous Polyandry of a Stream-dwelling Frog Feirana kangxianensis

2014 ◽  
Vol 5 (4) ◽  
pp. 240 ◽  
Author(s):  
WANG Jie ◽  
XIE Feng ◽  
WANG Gang ◽  
JIANG Jianping
Keyword(s):  
Group Spawning

Field observations on the reproductive behaviour of the cunner, Tautogolabrus adspersus (Walbaum), in Newfoundland

1979 ◽  
Vol 57 (1) ◽  
pp. 247-256 ◽  
Author(s):  
Robert A. Pottle ◽  
John M. Green
Keyword(s):  
Reproductive Effort ◽  
High Tide ◽  
Reproductive Behaviour ◽  
Time Of Day ◽  
Courtship Behaviour ◽  
Tautogolabrus Adspersus ◽  
Group Spawning ◽  
Conception Bay ◽  
Courtship Displays ◽  
Labrid Species

Courtship behaviour and pair spawning of the cunner, Tautogolabrus adspersus (Walbaum) were observed in Conception Bay, Newfoundland, during midsummer of 1977 and 1978. Courtship displays were recorded between 0600 and 2100 hours and spawns between 1300 and 2100 hours. The frequency of both courtship behaviour and spawns varied with the time of day. Spawning, but not courtship, is correlated with the tidal cycle. Spawns occur most often during the mid flood to high-tide phase of the eye le. Fish of both sexes are capable of multiple spawns per day. Both territorial and non territorial males acquire nuptial colouration between emergence from overwintering torpor and the start of the spawning season. Nonterritorial males are vigorously excluded from territories by the resident males and appear to contribute little to the reproductive effort of the population. Courtship and spawning occur only within male's territories. Group spawning was not observed. Sexual dichromatism and reproductive behaviour in the cunner are discussed with reference to other labrid species.

scholarly journals The influence of pre-recruitment growth on subsequent growth and age at first spawning in Atlantic herring (Clupea harengus L.)

2003 ◽  
Vol 60 (5) ◽  
pp. 1103-1113 ◽  
Author(s):  
Deirdre Brophy ◽  
Bret S Danilowicz
Keyword(s):  
Clupea Harengus ◽  
First Year ◽  
Fish Length ◽  
Subsequent Growth ◽  
Differential Growth ◽  
Stock Biomass ◽  
Spawning Stock ◽  
Group Spawning ◽  
First Year Of Life ◽  
The Relationship

Abstract Calculation of the spawning stock biomass for fisheries management requires information on the numbers or proportions of fish in each age- or length-group that are mature each year. This study was conducted to determine the relationship between growth and age of first reproduction in herring stocks around Ireland. Measurements of otolith size at the onset of the first annulus (O1) were used to compare growth during the first year of life between 1-, 2-, and 3-group spawning herring collected from spawning grounds in the Celtic Sea over a period of 3 years. The 1-group spawning fish had significantly greater mean O1 measurements, and hence showed faster growth on average during the first year of life than 2- or 3-group spawning fish. Fish that exhibited slow growth during the first year were absent from the adult spawning population at age 1, but occurred at similar levels in the samples of 2- and 3-group spawning fish. Regression of O1 radius on fish length at capture showed that growth during the first year of life had a small but significant effect on subsequent growth up to age 3. The relationship between pre-recruitment growth and subsequent growth and age at first spawning has implications for recruitment patterns of juveniles from different nursery areas and for the lifetime fecundity of population components with differential growth.

Short Communication: Observations of crown-of-thorns strafish spawning

1992 ◽  
Vol 43 (3) ◽  
pp. 535 ◽  
Author(s):  
W Gladstone
Keyword(s):  
Great Barrier Reef ◽  
Short Communication ◽  
Spring Tide ◽  
Barrier Reef ◽  
Acanthaster Planci ◽  
Single Female ◽  
Group Spawning

Individual and group spawning events of crown-of-thorns starfish (Acanthaster planci) were observed in the Whitsunday region, Great Barrier Reef, on the afternoon of 5 December 1990, during a falling tide, 2 days after a spring tide. Not all individuals in the group spawned, and only a single female spawned. The behaviour of the starfish during spawning is described.

scholarly journals Sexual development and reproductive pattern of the Mutton hamlet, Alphestes afer (Teleostei: Epinephelidae): a dyandric, hermaphroditic reef fish

2011 ◽  
Vol 9 (3) ◽  
pp. 547-558 ◽  
Author(s):  
Simone Marques ◽  
Beatrice Padovani Ferreira
Keyword(s):  
Sperm Competition ◽  
Group Structure ◽  
Maximum Size ◽  
Gonadal Development ◽  
Reproductive Period ◽  
Spawning Season ◽  
Reproductive Pattern ◽  
Multiple Spawning ◽  
Mating Group ◽  
Group Spawning

There is little knowledge on the reproduction of the genus Alphestes. The reproduction of the Mutton hamlet, Alphestes afer, sampled in Pernambuco reefs (Brazil) was studied based on macroscopic analysis during reproductive period and histological analysis of gonad material from March 2008 to October 2009. This study showed that A. afer is a diandric, protogynous hermaphrodite. Sex change followed protogynous mode in two pathways: primary males formed from immature female individuals or secondary males formed from resting, ripe or spent female individuals. The numerical distribution of gonad classes by size indicated that females from 11-18 cm L T were immature while females from 16-25 cm L T and males from 12-22 cm L T were in various stages of gonadal development. Individuals identified as immature bisexual and transitional (presenting both ovarian and sperm tissue) were sized from 16-24 cm L T. Size of first reproduction for females was 18 cm L T and for males was 12 cm L T. Alphestes afer showed multiple spawning, with spawning season period from August to December 2008 and from August to October 2009. The sex-ratio (females: males) in 2008 and 2009 was 0.94:1 during the months of spawning season. Males were smaller than females, reaching maximum size of 22 cm compared to 25 cm observed for females. Males showed a high sperm competition rank (3.8), suggesting intense sperm competition. This latter is a possible indication of a shift in the mating group structure from paired to group spawning. The presence of small males added to high sperm competition index, suggest that this species, while retaining the protogynous pattern, has a reproductive strategy similar to gonochorist epinephelids.

Dualistic spawning behaviour of the cunner, Tautogolabrus adspersus (Pisces: Labridae), in Bonne Bay, Newfoundland

1981 ◽  
Vol 59 (8) ◽  
pp. 1582-1585 ◽  
Author(s):  
Robert A. Pottle ◽  
John M. Green ◽  
Guy Martel
Keyword(s):  
Tautogolabrus Adspersus ◽  
Spawning Aggregations ◽  
Single Location ◽  
Group Spawning ◽  
Spawning Behaviour ◽  
Blue Phase ◽  
Recorded Occurrence

Group spawning and pair spawning cunners, Tautogolabrus adspersus, were studied at Bonne Bay, Newfoundland. This is the first recorded occurrence of both types of spawning behaviour of this species at a single location. Group spawning occurred within aggregations of 30 to > 150 fish. Cunners in group spawning aggregations ranged in length from 80 to 180 mm. Those with brown phase colouration outnumbered those with male nuptial (blue phase) colouration by at least 3:1. All courtship was initiated by males with nuptial colouration, but some brown-phase males participated in group spawnings. Pair spawning involved territorial males and was observed within 5 m of an aggregation in which group spawning was occurring. Territorial males were larger than 200 mm and had nuptial colouration. They were not observed where small (< 180 mm) cunners were most abundant. Group spawning occurred in the afternoon, being most frequent between 1800 and 1900 hours.

Group spawning results from the streaking of small males into a sneaking pair: male alternative reproductive tactics in the threespot wrasse Halichoeres trimaculatus

2008 ◽  
Vol 26 (3) ◽  
pp. 397-404 ◽  
Author(s):  
Shohei Suzuki ◽  
Kyoko Toguchi ◽  
Yoshimi Makino ◽  
Tetsuo Kuwamura ◽  
Yasuhiro Nakashima ◽  
...  
Keyword(s):  
Alternative Reproductive Tactics ◽  
Reproductive Tactics ◽  
Group Spawning

An Environmental Estrogen Alters Reproductive Hierarchies, Disrupting Sexual Selection in Group-Spawning Fish

2008 ◽  
Vol 42 (13) ◽  
pp. 5020-5025 ◽  
Author(s):  
Tobias S. Coe ◽  
Patrick B. Hamilton ◽  
David Hodgson ◽  
Gregory C. Paull ◽  
Jamie R. Stevens ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Environmental Estrogen ◽  
Group Spawning

Role of spawning condition in the determination of the reproductive traits of spring- and autumn-spawning Atlantic herring from the southern Gulf of St. Lawrence

1993 ◽  
Vol 71 (2) ◽  
pp. 309-317 ◽  
Author(s):  
Rodney G. Bradford
Keyword(s):  
Body Size ◽  
Lipid Content ◽  
Reproductive Traits ◽  
Gonad Maturation ◽  
Maturation Period ◽  
Egg Weight ◽  
Storage Lipids ◽  
Length Relationship ◽  
Group Spawning ◽  
Storage Energy

Mature spring-spawning (May–June) and autumn-spawning (August–September) herring differ in total weight. Autumn herring have both heavier gonads and higher somatic weights at length. Both the residual levels of storage lipids and somatic weight at length, corrected for storage lipid, are higher in autumn than in spring. Within spawning seasons, males and females deplete the same amount of storage energy. Percent somatic lipid content is positively correlated with body size during spring but shows no relationship to body size in autumn. These patterns indicate that the relative allocation of storage energy to reproduction differs with spawning season. Spring spawners (lengthy gonad maturation period) allocate proportionally more storage energy to routine and active metabolism than autumn spawners (brief gonad maturation period). The low intercept and steep slope of the gonad weight – length relationship for spring spawners reflect the interaction between decreasing metabolic rate with body size and increasing storage energy capacity with body size. Egg weight is unrelated to the parent's somatic lipid content for either spawning group. Spawning history (recruit versus repeat spawning) has only a minor influence on egg weight.

Terrestrial Group Spawning of Brycon petrosus (Pisces: Characidae) in Panama

Copeia ◽  
1978 ◽  
Vol 1978 (3) ◽  
pp. 536 ◽  
Author(s):  
Donald L. Kramer
Keyword(s):  
Group Spawning
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