Biology

and, Deborah Ismael; New, Michael B.

doi:10.1002/9780470999554.ch3

Cited by 26 publications

(10 citation statements)

References 83 publications

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“…The larvae hatch as zoeae in the Macrobrachium spp. i.e., they tipically utilize their thoracic appendages to swim, differing from panaeid shrimp which hatch as nauplii that are morphologically less developed and use their cephalic appendages to swim, Ismael and New (2000). The firststage zoeae are less than 2 mm long (from the tip of the rostrum to tip of the telson) in M. rosenbergii but the first stage larvae measure about 8 mm in M. lamarrei.…”

Section: Stages Of Developmentmentioning

confidence: 98%

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General Biology of Freshwater Prawn, <i>Macrobrachium lamarrei</i> (H. Milne-Edwards) of Biratnagar, Nepal

Sharma

Subba

1970

Our Nature

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Macrobrachium lamarrei (H. Milne-Edward) is commonly known as “kuncho river prawn,” occurring in freshwater ponds and rivers of Biratnagar, Nepal. They are nocturnal species feed voraciously on planktonic organisms, algae, muscles pieces of their own kind or fish etc. M. lamarrei is a medium-sized prawn ranging from 75-80 mm in length rostrum bears 7-9 teeth dorsally and 5-8 ventrally. The estimation of fecundity was done following egg counting method from March, 2004 to February, 2005. The mean fecundity ranged from 82-308 in the prawn having mean body length 57-74 mm and mean bodyweight 0.78-1.62 g. The correlation coefficient (r) of the relationship between body length and fecundity, and body weight and fecundity were 0.201 and 0508 respectively, indicating insignificant relationship. The mean fecundity was found to be 183.55 and mean relative fecundity ranged from 82-221.79. The mature eggs measured 0.54-0.64 mm on its long axis. The suitable temperature recorded during egg laying time was found to be 30±2oC, Do 10 mgl-1 and pH 7.75-8. Marked differences in the morphology and habit of larval stages of prawn ranging from length of body to number of rostral teeth were noted.Key words: Biratnagar, General biology, Macrobrachium lamarrei, Nepaldoi:10.3126/on.v3i1.332Our Nature (2005) 3: 31-41

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Section: Stages Of Developmentmentioning

confidence: 98%

“…This part possesses six segments where each segment bears a pair of ventral appendages called pleopods or swimmerets. The swimmerets of the sixth abdominal somites are stiff and hard, and the telson serves as tail fan (Ismael and New, 2000).…”

Section: General Morphologymentioning

confidence: 99%

General Biology of Freshwater Prawn, <i>Macrobrachium lamarrei</i> (H. Milne-Edwards) of Biratnagar, Nepal

Sharma

Subba

1970

Our Nature

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“…, 1999; Benstead, March & Pringle, 2000; Fievet, 2000). However, studies on some amphidromous palaemonid shrimps from large continental river systems indicate that gravid females migrate downstream to brackish‐water estuaries ( Cryphiops caementarius : Hartmann, 1958; M. rosenbergii (De Man): Ling, 1969; Ismael & New, 2000; M. ohione : Bauer & Delahoussaye, 2008). Ibrahim (1962) concluded that females of M. malcolmsonii Milne Edwards in India do not go all the way to the Godvari estuary but may release larvae as far as 80 km upstream with the river at flood stage.…”

Section: Discussionmentioning

confidence: 99%

“…The latter method has been suggested especially for Macrobrachium spp . inhabiting large continental river systems, in which the distances between the adult habitat and the sea can be great (Ling, 1969; Ismael & New, 2000). Further, a close relative of Macrobrachium , Cryphiops caementarius (Molina) in Peru, has been reported to show a downstream hatching migration by females (Hartmann, 1958).…”

Section: Introductionmentioning

confidence: 99%

Delivery of hatching larvae to estuaries by an amphidromous river shrimp: tests of hypotheses based on larval moulting and distribution

2009

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1. Amphidromous shrimps live and breed in freshwater rivers and streams, but their larvae require development in sea water. Larvae may hatch upstream and then drift to the sea, although in some species females have been reported to migrate to the coast before larvae are released. Here, we tested the relative importance of larval drift and female migration in Macrobrachium ohione (Decapoda: Palaemonidae) in a distributary of the Mississippi River in Louisiana, U.S.A. 2. Newly hatched (stage-1) larvae are nonfeeding and will not moult to stage 2 (first feeding stage) without encountering salt water. A factorial experiment was conducted in the laboratory to test the effects on moulting to stage 2 of (i) time spent by stage-1 larvae in fresh water before (ii) exposure to and maintenance in water of different salinity. Larvae kept in fresh water for 1 or 3 days before a change to saline water at 6 or 10 ppt showed a greater frequency of moulting than those kept for longer (5 days) in fresh water or changed to less saline water (2 ppt). Non-moulting larvae died or were moribund within 11 days of hatching. 3. The relative abundance of stage-1 larvae was measured with plankton tows at two locations in the river c. 150 km apart, one near the sea and one upstream. Larval abundances near the sea were significantly greater than those upstream. 4. The results indicate that hatched larvae of M. ohione have a limited period in which to drift in fresh water before reaching water sufficiently saline to stimulate moulting to the first feeding stage. Female migrations may play an important role in delivering larvae of amphidromous species from large continental river systems in which distances to the sea are great, while larval drift alone may be sufficient in species living in short streams, like those found in many small mountainous tropical islands.

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“…The berried females migrate downstream to estuaries to release eggs, and the larvae hatch as zoea. After the zoea grow and reach to the postlarval stage, they migrate into rivers and lakes ( Ismael & New 2000 ). However, the occurrence of acid rain results in acidification of river and lake waters ( Sin & Agrawal 2008 ), and it is now recognized as a serious threat to aquatic ecosystems ( Alston & Sampaio 2000 ).…”

Section: Introductionmentioning

confidence: 99%

Low pH Water Impairs the Tactile Sense of the Postlarvae of the Giant Freshwater Prawn Macrobrachium rosenbergii

Kawamura

Bagarinao

Yong

et al. 2018

TLSR

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The effect of low pH on the tactile sense of Macrobrachium rosenbergii postlarvae was determined in the laboratory by means of two behavioural assays: shelter (netting) occupancy and jumping response to touch stimuli (taps) by a glass micropipette. The postlarvae were acclimated to pH 4, pH 5, pH 6 and pH 7.5 (control) in 45 L aquaria 5–7 d before the experiments. Shelter occupancy decreased with pH and was significantly lower at pH 4 and pH 5 than at pH 6 and in the control. The jumping response instantly followed a tap 93–98% of the time in the control, pH 6 and pH 5 treatments. However, the postlarvae showed significantly lower jumping response (65%) at pH 4, indicating an impaired tactile sense. Low pH 4–5 probably degrades the chitin of the sensory setae and inhibits the surface mechanoreceptors of the prawn postlarvae.

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Biology

Cited by 26 publications

References 83 publications

General Biology of Freshwater Prawn, <i>Macrobrachium lamarrei</i> (H. Milne-Edwards) of Biratnagar, Nepal

General Biology of Freshwater Prawn, <i>Macrobrachium lamarrei</i> (H. Milne-Edwards) of Biratnagar, Nepal

Delivery of hatching larvae to estuaries by an amphidromous river shrimp: tests of hypotheses based on larval moulting and distribution

Low pH Water Impairs the Tactile Sense of the Postlarvae of the Giant Freshwater Prawn Macrobrachium rosenbergii

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