Particle retention by non-suspension-feeding cyprinid fishes

1998 ◽  
Vol 55 (4) ◽  
pp. 861-868 ◽  
Author(s):  
S Laurie Sanderson ◽  
Mark E Mort ◽  
Joseph J Cech, Jr.
Keyword(s):  
Fish Species ◽  
Brine Shrimp ◽  
Morphological Features ◽  
Body Volume ◽  
Suspension Feeding ◽  
Gill Rakers ◽  
Particle Retention ◽  
Ptychocheilus Grandis ◽  
Cyprinid Fishes ◽  
Brine Shrimp Cysts

Insectivorous Sacramento squawfish (Ptychocheilus grandis) and omnivorous benthic-feeding California roach (Hesperoleucus symmetricus) were exposed to suspended styrene microspheres (31-90 µm) or brine shrimp cysts (210-300 µm) in the presence of finely crushed Tetramin flakes or adult Artemia. These fish species retained small numbers of microspheres, and significantly more brine shrimp cysts than microspheres. During a 10-min period, they swallowed all of the brine shrimp cysts from a volume of water equivalent to 1-15 times their body volume. Squawfish and roach do not possess the morphological features of the branchial apparatus and palate that are associated with suspension feeding in confamilial Sacramento blackfish (Orthodon microlepidotus). The brine shrimp cysts could have been trapped between squawfish and roach gill rakers, while the microspheres as well as the brine shrimp cysts could have been retained on mucus-covered buccopharyngeal surfaces. These results suggest that non-suspension-feeding fish species may ingest small suspended particles routinely, with energetic and ecotoxicological implications that deserve further study.

A new look on the morphometric characteristics of Congridae leptocephali from the southern Adriatic Sea

2021 ◽  
pp. 1-5
Author(s):  
M. Mandić ◽  
I. Leonori ◽  
A. De Felice ◽  
S. Gvozdenović ◽  
A. Pešić
Keyword(s):  
Fish Species ◽  
Adriatic Sea ◽  
Pelagic Fish ◽  
Morphometric Parameters ◽  
Morphological Features ◽  
Morphometric Characteristics ◽  
Small Pelagic Fish ◽  
Acoustic Surveys ◽  
Western Side ◽  
Conger Conger

Abstract Anguillid leptocephali of three Congridae species (Conger conger, Ariosoma balearicum and Gnathophis mistax) were caught as bycatch of pelagic trawls during acoustic surveys targeting small pelagic fish species in the southern Adriatic Sea, carried out under the framework of the Italian MEDIAS project (western side) and its extension in the ambit of the FAO AdriaMed project (eastern side). Results refer to the findings of Congridae leptocephali during surveys conducted in 2011, 2014, 2015 and 2016. A total of 25 specimens were caught and analysed (morphological features and pigmentation patterns). Leptocephali of Conger conger were found in the range of 8.4–13.1 cm total length (TL) (between 50 and 132 m depth), Ariosoma balearicum from 9.7–12.2 cm TL (between 50 and 128 m depth) and for Gnathophis mystax in the range from 6.4–11.7 cm TL (between 40 and 79 m depth). The results indicate that the southern Adriatic Pit could be the spawning area of these species in the Adriatic Sea. Present data represent a contribution to existing knowledge about the ecology of leptocephali from the Congridae family in the southern Adriatic Sea, and also indicate the existence of differences in morphometric parameters between different areas, that is, the possibility of the existence of new geographic lines within the genus Ariosoma in the Adriatic Sea.

scholarly journals Studies on hatching rate of brine shrimp cysts from Barkol Lake in Xinjiang, China

1995 ◽  
Vol 7 (2) ◽  
pp. 157-163
Author(s):  
Ma Zhizhen ◽  
◽  
Chen Huiyuan ◽  
Wu Zhenbin
Keyword(s):  
Brine Shrimp ◽  
Hatching Rate ◽  
Brine Shrimp Cysts ◽  
Barkol Lake

Remote sensing of brine shrimp cysts in salt lakes

2021 ◽  
Vol 266 ◽  
pp. 112695
Author(s):  
Lin Qi ◽  
Yao Yao ◽  
David E. English ◽  
Ronghua Ma ◽  
John Luft ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Brine Shrimp ◽  
Salt Lakes ◽  
Brine Shrimp Cysts

scholarly journals Particle retention in suspension-feeding fish after removal of filtration structures

Zoology ◽  
2013 ◽  
Vol 116 (6) ◽  
pp. 348-355 ◽  
Author(s):  
Jennifer C. Smith ◽  
S. Laurie Sanderson
Keyword(s):  
Suspension Feeding ◽  
Particle Retention

A New Model of Particle Retention and Branchial Sieve Adjustment in Filter-Feeding Bream (Abramis brama, Cyprinidae)

1991 ◽  
Vol 48 (1) ◽  
pp. 7-18 ◽  
Author(s):  
Wim Hoogenboezem ◽  
Jos G. M. van den Boogaart ◽  
Ferdinand A. Sibbing ◽  
Eddy H. R. R. Lammens ◽  
Arie Terlouw ◽  
...  
Keyword(s):  
Channel Model ◽  
Gill Arch ◽  
Abramis Brama ◽  
Filter Feeding ◽  
Gill Rakers ◽  
Channel Diameter ◽  
New Model ◽  
Bream Abramis Brama ◽  
Particle Retention ◽  
Food Particles

A new model for filter feeding in bream (Abramis brama, Cyprinidae) is presented based on the three dimensional architecture of the branchial sieve. Transverse ridges on the upper surface of the gill arches form a system of channels in which food particles appear to be retained. These ridges are formed by a fleshy interconnection between the middle part of the gill arch and the bony parts of its gill rakers. Muscles attached to the rakers, present only on the lateral edge of the gill arch, indicate movability of the lateral bony raker element. If the fish is foraging on particles smaller than the channel diameter, movement of these gill rakers probably adjusts the sieve by reducing the channel diameter of the opposite channel. Selectivity of bream depends on available size classes of zooplanktons and changes in selectivity are attributed to adjustment of the branchial sieve. The channel model has been tested with feeding experiments and X-ray cinematography. The reconstructed paths of marked food particles show that particles follow the hypothesized path. Particle retention occurred mainly at the expected medial site of the arches. Our study strongly supports the channel model of particle retention.

Bryconops magoi and Bryconops collettei (Characiformes:  Characidae), two new freshwater fish species from Venezuela,  with comments on B. caudomaculatus (Günther)

Zootaxa ◽  
2005 ◽  
Vol 1094 (1) ◽  
pp. 1 ◽  
Author(s):  
BARRY CHERNOFF ◽  
ANTONIO MACHADO-ALLISON
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Fish Species ◽  
Lateral Line ◽  
Color Patterns ◽  
Morphometric Characteristics ◽  
Gill Rakers ◽  
Freshwater Fish Species ◽  
Red Color ◽  
Amazonas State

Bryconops collettei and B. magoi  are described from the Caura and Miamo (Bolívar State), Iguapo (Amazonas State) and Moquete (Anzoátegui State) rivers, Venezuela.  These new species belong to the subgenus Bryconops, based upon apomorphies of the jaws and gill rakers and are compared with members of the subgenus.  Based on morphology, meristics and color patterns, B. collettei and B. magoi are distinguished from B. caudomaculatus, the closest species in the subgenus, by having a generally more slender body, pored scales of the lateral line extending beyond the hypural plate, and a diffuse ocellus partially filled with red color only on the upper lobe of the caudal fin.  Bryconops collettei is distinguished from B. magoi on the basis of meristic and morphometric characteristics.  B. caudomaculatus has been largely misidentified in the literature and we provide comments as a guide to its proper recognition.

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