Life history characteristics of the fluvial shrimp Macrobrachium yui (Holthuis, 1950) (Decapoda, Palaemonidae) spawning in the cave streams in northern Laos

Crustaceana ◽  
2015 ◽  
Vol 88 (2) ◽  
pp. 164-183 ◽  
Author(s):  
Aloun Kounthongbang ◽  
Oulaytham Lasasimma ◽  
Pany Souliyamath ◽  
Keiichiro Iguchi ◽  
Sayaka Ito
Keyword(s):  
Life History ◽  
Physiological Condition ◽  
Gonadosomatic Index ◽  
River System ◽  
Morphological Development ◽  
Size Distributions ◽  
Free Swimming ◽  
Size Frequency Distribution ◽  
Migratory Patterns ◽  
Drifting Larvae

This study aims to understand the reproductive and larval characteristics and the migratory patterns of the shrimpMacrobrachium yui(Holthuis, 1950). We conducted monthly samplings of the adult, juvenile and larval shrimp at fixed points in the Xuang River system in northern Laos. We determined the seasonal changes in size frequency distribution, difference in size among sampling sites, occurrence of drifting larvae, and physiological condition of the shrimp. The size distributions ofM. yuidiffered significantly throughout the year among sections of the river system: small-sized juveniles occurred in the Xuang River, various size classes in the Pho Stream, and larger adults in the Bokengsakang cave stream. The gonadosomatic index of females is the highest in the Bokengsakang cave stream and the gonadosomatic index of males is the highest in the Pho Stream. Drifting larvae that had already completed morphological development for settlement on the substrate occurred only in the Bokengsakang cave stream, although the hatched larvae have a free-swimming larval period. The overall results indicate thatM. yuifemales spawn in the Bokengsakang cave stream after mating with males during or before migration to the cave stream, and the hatched larvae remain in the cave stream until settling on the bottom. The life history migration ofM. yuiis attributed to the early stages of the life cycle, depending strongly on the cave stream.

scholarly journals Reproductive biology of Hybopsis amblops, the Bigeye Chub, in the Flint River of Alabama

2019 ◽  
Author(s):  
Crissy L Tarver ◽  
Bruce W Stallsmith
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Gonadosomatic Index ◽  
Reproductive Traits ◽  
River System ◽  
Mature Oocyte ◽  
Oocyte Stage ◽  
Steep Decline ◽  
Large Clutch ◽  
Flint River

Background. The purpose of this study was to establish a reproductive schedule and examine reproductive traits that shape fecundity of the Bigeye Chub, Hybopsis amblops Cyprinidae, in the Flint River system of north Alabama. Methods. Life history traits associated with reproduction, growth, and maturation were assessed. Fish collections were made monthly from August, 2013, through July, 2014. Results. The Bigeye Chub in Alabama primarily spawns in April and May as indicated by gonadosomatic index (GSI), ovarian condition and clutch size. Average GSI values began to rise in February, peaked in April and May at over 13% for females and 1.6% for males, and showed a steep decline from May to June for both sexes. Average clutch size was highest in April at 812. Diameter of the most mature oocyte stage averaged 0.74 mm, relatively small compared to other cyprinids found in the Flint River. Discussion. The Bigeye Chub’s relatively large clutch size as a measure of fecundity places the species intermediate between opportunistic and periodic in the trilateral life history scheme of Winemiller and Rose. The species is apparently responding to a flow regime with a defined seasonality as well as predictability of flow and resources.

scholarly journals Reproductive biology of Hybopsis amblops, the Bigeye Chub, in the Flint River of Alabama

2019 ◽  
Author(s):  
Crissy L Tarver ◽  
Bruce W Stallsmith
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Gonadosomatic Index ◽  
Reproductive Traits ◽  
River System ◽  
Mature Oocyte ◽  
Oocyte Stage ◽  
Steep Decline ◽  
Large Clutch ◽  
Flint River

Background. The purpose of this study was to establish a reproductive schedule and examine reproductive traits that shape fecundity of the Bigeye Chub, Hybopsis amblops Cyprinidae, in the Flint River system of north Alabama. Methods. Life history traits associated with reproduction, growth, and maturation were assessed. Fish collections were made monthly from August, 2013, through July, 2014. Results. The Bigeye Chub in Alabama primarily spawns in April and May as indicated by gonadosomatic index (GSI), ovarian condition and clutch size. Average GSI values began to rise in February, peaked in April and May at over 13% for females and 1.6% for males, and showed a steep decline from May to June for both sexes. Average clutch size was highest in April at 812. Diameter of the most mature oocyte stage averaged 0.74 mm, relatively small compared to other cyprinids found in the Flint River. Discussion. The Bigeye Chub’s relatively large clutch size as a measure of fecundity places the species intermediate between opportunistic and periodic in the trilateral life history scheme of Winemiller and Rose. The species is apparently responding to a flow regime with a defined seasonality as well as predictability of flow and resources.

scholarly journals Reproductive biology of Hybopsis amblops, the Bigeye Chub, in the Flint River of Alabama

2018 ◽  
Author(s):  
Crissy L Tarver ◽  
Bruce W Stallsmith
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Gonadosomatic Index ◽  
Reproductive Traits ◽  
River System ◽  
Mature Oocyte ◽  
Oocyte Stage ◽  
Steep Decline ◽  
Large Clutch ◽  
Flint River

Background. The purpose of this study was to establish a reproductive schedule and examine reproductive traits that shape fecundity of the Bigeye Chub, Hybopsis amblops Cyprinidae, in the Flint River system of north Alabama. Methods. Life history traits associated with reproduction, growth, and maturation were assessed. Fish collections were made monthly from August, 2013, through July, 2014. Results. The Bigeye Chub in Alabama primarily spawns in April and May as indicated by gonadosomatic index (GSI), ovarian condition and clutch size. Average GSI values began to rise in February, peaked in April and May at over 13% for females and 1.6% for males, and showed a steep decline from May to June for both sexes. Average clutch size was highest in April at 812. Diameter of the most mature oocyte stage averaged 0.74 mm, relatively small compared to other cyprinids found in the Flint River. Discussion. The Bigeye Chub’s relatively large clutch size as a measure of fecundity places the species intermediate between opportunistic and periodic in the trilateral life history scheme of Winemiller and Rose. The species is apparently responding to a flow regime with a defined seasonality as well as predictability of flow and resources.

scholarly journals Reproductive biology of Hybopsis amblops, the Bigeye Chub, in the Flint River of Alabama

2019 ◽  
Author(s):  
Crissy L Tarver ◽  
Bruce W Stallsmith
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Gonadosomatic Index ◽  
Reproductive Traits ◽  
River System ◽  
Mature Oocyte ◽  
Oocyte Stage ◽  
Steep Decline ◽  
Large Clutch ◽  
Flint River

Background. The purpose of this study was to establish a reproductive schedule and examine reproductive traits that shape fecundity of the Bigeye Chub, Hybopsis amblops Cyprinidae, in the Flint River system of north Alabama. Methods. Life history traits associated with reproduction, growth, and maturation were assessed. Fish collections were made monthly from August, 2013, through July, 2014. Results. The Bigeye Chub in Alabama primarily spawns in April and May as indicated by gonadosomatic index (GSI), ovarian condition and clutch size. Average GSI values began to rise in February, peaked in April and May at over 13% for females and 1.6% for males, and showed a steep decline from May to June for both sexes. Average clutch size was highest in April at 812. Diameter of the most mature oocyte stage averaged 0.74 mm, relatively small compared to other cyprinids found in the Flint River. Discussion. The Bigeye Chub’s relatively large clutch size as a measure of fecundity places the species intermediate between opportunistic and periodic in the trilateral life history scheme of Winemiller and Rose. The species is apparently responding to a flow regime with a defined seasonality as well as predictability of flow and resources.

Biology, Management, and Protection of North American Sturgeon

2002 ◽  
Keyword(s):  
Life History ◽  
Gulf Of Mexico ◽  
River System ◽  
Ultrasonic Telemetry ◽  
Marine Habitat ◽  
Gulf Sturgeon ◽  
Sandy Substrate ◽  
Sampling Locations ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

Abstract.<em>—</em>Although most species of anadromous sturgeons worldwide are threatened with extinction, information on the estuarine and marine components of their life history is generally lacking. During March 1997 to July 1999, we used ultrasonic telemetry to examine estuarine and marine habitat use of adult Gulf sturgeon <em>Acipenser oxyrinchus desotoi</em> from the Choctawhatchee Bay/River System, Florida. During winter and spring, telemetered Gulf sturgeon were distributed nonrandomly within Choctawhatchee Bay, with most relocations in nearshore areas 2–4 m deep. Within the bay, Gulf sturgeon occasionally moved long distances but usually remained in localized areas (<1 km<sup>2</sup>) for several weeks. Areas where Gulf sturgeon remained for prolonged periods were characterized by sandy substrate harboring a benthic community dominated by crustaceans and annelids. A majority of male Gulf sturgeon remained exclusively in Choctawhatchee Bay during the winter and spring. In contrast, a majority of females during this time were either relocated in the Gulf of Mexico or were absent at sampling locations, having last been detected at bay entrances. Declines in habitat quality in Choctawhatchee Bay and the Gulf of Mexico may hinder recovery of this species, since adult Gulf sturgeon rely on these areas for nourishment during periods of gonadal growth.

scholarly journals Diversity, abundance, and life histories of littoral chydorids (Cladocera: Chydoridae) in a subarctic European lake

2020 ◽  
Vol 40 (5) ◽  
pp. 534-543
Author(s):  
Anders Klemetsen ◽  
Berit M Aase ◽  
Per-Arne Amundsen
Keyword(s):  
Life History ◽  
Life Histories ◽  
Late Summer ◽  
Fish Predation ◽  
Oligotrophic Lake ◽  
Size Distributions ◽  
Oligotrophic Lakes ◽  
Chydorus Sphaericus ◽  
Challenging Environment ◽  
Subarctic Lake

Abstract Littoral chydorids were sampled with a bottom sledge in Takvatn, a 15 km2 north Norwegian oligotrophic lake with poor vegetation. Three out of eight recorded species of chydorids were common, with abundance minima in late summer and maxima in autumn. Eurycercus lamellatus (O.F. Müller, 1776) and Acroperus harpae (Baird, 1835) were monocyclic, whereas Chydorus sphaericus (O.F. Müller, 1776) was seemingly acyclic. Females of E. lamellatus appeared in early June and grew to maximum sizes of 2–2.5 mm in early August. Parthenogenesis started in late July and two summer generations could be distinguished by size distributions. Gamogenesis took place in September. Acroperus harpae females appeared in early June and grew to maximum sizes of around 0.7 mm in early August. Parthenogenesis started in early July and gamogenesis took place in September and October. Parthenogenetic females of C. sphaericus appeared already at ice-break and had constant sizes of around 0.4 mm through the entire season. Males or ephippial females were not observed. The acyclic life history may be an adaptation to the challenging environment of this subarctic lake. Summer generations could not be distinguished in the two small-sized species, but both populations reached high abundances in autumn. The abundance of E. lamellatus increased from August, but then decreased, possibly as a result of fish predation. We argue that the present results are typical for large oligotrophic lakes in subarctic Europe.

Capital or income breeding crabs: who are the better invaders?

Crustaceana ◽  
2014 ◽  
Vol 87 (14) ◽  
pp. 1648-1656 ◽  
Author(s):  
Yiwen Zeng ◽  
Colin McLay ◽  
Darren C. J. Yeo
Keyword(s):  
Life History ◽  
Gonadosomatic Index ◽  
Carcinus Maenas ◽  
Breeding Strategy ◽  
Life History Trait ◽  
Hepatosomatic Index ◽  
Hemigrapsus Sanguineus ◽  
Life History Pattern ◽  
Income Breeding ◽  
Capital Breeder

A recent study by Griffen et al. (2012) drew a link between invasiveness and breeding strategy (income or capital breeding), a hitherto unconsidered life-history trait, in crabs. The methods used by the authors identified Carcinus maenas (Linnaeus, 1758) as a capital breeder and Hemigrapsus sanguineus (De Haan, 1853) as an income breeder. We extend this association of breeding strategies and invasiveness to other crab species and note that crabs in general are capital breeders based on the concurrent opposing trends of gonadosomatic index and hepatosomatic index during secondary vitellogenesis (indicating an endogenous source of nutrients for reproduction). We identify possible reasons why H. sanguineus may be regarded as an exception to this brachyuran life history pattern. Given that some species could be capable of a mixed breeding strategy, we propose experimental methods for determining such strategies.

Captive breeding of the sandhill dunnart, Sminthopsis psammophila (Marsupialia:Dasyuridae): reproduction, husbandry and growth and development

2011 ◽  
Vol 33 (1) ◽  
pp. 21 ◽  
Author(s):  
Cathy Lambert ◽  
Glen Gaikhorst ◽  
Phillip Matson
Keyword(s):  
Life History ◽  
Growth And Development ◽  
Captive Breeding ◽  
Arid Zone ◽  
Life History Strategy ◽  
Morphological Development ◽  
Reproductive Parameters ◽  
Seasonal Breeder ◽  
Range Interval ◽  
The Average Range

Little is known of the reproductive biology of the endangered sandhill dunnart (Sminthopsis psammophila). This study demonstrates the first captive breeding of the species, defines several important reproductive parameters and documents morphological development of the young. The study confirmed field speculation that S. psammophila is a seasonal breeder and adopts a life-history strategy similar to that of other arid-zone Sminthopsinae. The average (range) interval from mating to birth is 18 (16–19) days.

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