Lake sturgeon (Acipenser fulvescens) growth chronologies

1999 ◽  
Vol 56 (10) ◽  
pp. 1752-1756 ◽  
Author(s):  
Gregory T LeBreton ◽  
F William H. Beamish ◽  
Robert G Wallace
Keyword(s):  
Lake Sturgeon ◽  
Acipenser Fulvescens ◽  
Decision Criteria ◽  
Pectoral Fin ◽  
Extrinsic Factors ◽  
Fin Rays ◽  
Growth Variation ◽  
Pectoral Fin Rays

We used annual increments in the pectoral fin rays of lake sturgeon (Acipenser fulvescens) to assess growth synchrony. We based our decision criteria on correlation among individual chronologies developed from samples collected in the Saskatchewan River, Saskatchewan, and Lake St. Clair and the Mattagami River, Ontario. Initially, correlations among chronologies were not significant within these three populations. However, as mean ageing error was reduced, correlations among chronologies increased to significant levels in samples from the Saskatchewan River and Lake St. Clair. Correlations were not significant among consistently aged fish sampled from the Mattagami River. We conclude that interannual growth variation in lake sturgeon is influenced by population-wide extrinsic factors in some populations. Our results suggest that both growth synchrony and ageing error should be quantified during the construction of growth chronologies for all organisms.

scholarly journals Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jeffrey R. Ziegeweid ◽  
Michelle R. Bartsch ◽  
Lynn A. Bartsch ◽  
Steven J. Zigler ◽  
Robert J. Kennedy ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Mississippi River ◽  
Lake Sturgeon ◽  
Fish Length ◽  
Pectoral Fin ◽  
Food Web Structure ◽  
Fin Ray ◽  
Study Results ◽  
Fin Rays ◽  
Pectoral Fin Rays

Abstract Background Reproducing populations of invasive carps (Hypophthalmichthys spp.) could alter aquatic food webs and negatively affect native fishes in the Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN). However, proposed invasive carp barriers may also threaten populations of native migratory fishes by preventing movements of fish between rivers that are necessary for life history requirements. In this study, nonlethal chemical techniques were used to provide baseline data related to the condition, trophic position, and migratory histories of lake sturgeon (Acipenser fulvescens) captured in the Mississippi and St. Croix Rivers. Results Fish length and weight measurements and age estimates determined from pectoral fin rays demonstrated that lake sturgeon from the Mississippi River had greater lengths-at-age compared to sturgeon from the St. Croix River. However, length–weight relations were similar for sturgeon from the Mississippi and St. Croix Rivers. Lake sturgeon captured from different locations had distinguishable fatty acid signatures, and stable isotope analyses demonstrated that lake sturgeon from the Mississippi River generally feed at a higher trophic level than those in the St. Croix River. Strontium-to-calcium ratios (Sr:Ca) from fin ray cross sections indicated that sturgeon captured from the Mississippi River had higher Sr:Ca values than sturgeon captured from the St. Croix River, and natal origins and capture locations were not significantly different among sturgeon captured within individual rivers. Most sturgeon were captured in water with a similar Sr:Ca signature as their natal waters, indicating that there is some separation between populations of lake sturgeon in the St. Croix and Mississippi Rivers. However, Sr:Ca data indicated substantial variation in movement patterns among individual lake sturgeon, indicating that populations interact through migrations of individual fish between rivers. Conclusions Study results provide baseline condition and food web structure index data for assessing changes in lake sturgeon populations should invasive carps become established in these areas of the Mississippi and St. Croix Rivers. Controlled-exposure and telemetry studies would help verify and enhance the relations between Sr:Ca signatures in water and lake sturgeon pectoral fin rays to further assess mixing of sturgeons between rivers.

scholarly journals Resurrection of the genus Homalopteroides (Teleostei: Balitoridae) with a redescription of H. modestus (Vinciguerra 1890)

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 329 ◽  
Author(s):  
ZACHARY S. RANDALL ◽  
LAWRENCE M. PAGE
Keyword(s):  
Lateral Line ◽  
Head Length ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Interorbital Width ◽  
Fin Rays ◽  
Orbital Rim ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

The genus Homalopteroides Fowler 1905 is resurrected and distinguished from the genus Homaloptera van Hasselt 1823based on a combination of characters including a unique mouth morphology, dorsal-fin origin over pelvic fin,≤60 lateral-line scales, and≤30 predorsal scales. Species included in Homalopteroides are H. wassinkii (Bleeker 1853), H. modestus(Vinciguerra 1890), H. rupicola (Prashad & Mukerji 1929), H. smithi (Hora 1932), H. stephensoni (Hora 1932), H. weberi(Hora 1932), H. tweediei (Herre 1940), H. indochinensis (Silas 1953), H. nebulosus (Alfred 1969), H. yuwonoi (Kottelat1998), and possibly H. manipurensis (Arunkumar 1999). Homalopteroides modestus (Vinciguerra 1890) is a poorlyknown species that was originally described from the Meekalan and Meetan rivers of southern Myanmar. It occurs in theSalween, Mae Khlong, and Tenasserim basins, and can be distinguished from all other species of Homalopteroides by thecombination of caudal-fin pattern (black proximal and distal bars, median blotch), 15 pectoral-fin rays, pectoral-fin lengthgreater than head length, 5½–6½ scales above and 5–6 scales below the lateral line (to the pelvic fin), 39–44 total lateral-line pores, no axillary pelvic-fin lobe, pelvic fin not reaching anus, orbital length less than interorbital width in adult, and maxillary barbel reaching to or slightly past the anterior orbital rim.

Using Trace Elements in Pectoral Fin Rays to Assess Life History Movements in Sturgeon: Estimating Age at Initial Seawater Entry in Klamath River Green Sturgeon

2009 ◽  
Vol 138 (2) ◽  
pp. 240-250 ◽  
Author(s):  
Peter J. Allen ◽  
James A. Hobbs ◽  
Joseph J. Cech ◽  
Joel P. Van Eenennaam ◽  
Serge I. Doroshov
Keyword(s):  
Trace Elements ◽  
Life History ◽  
Green Sturgeon ◽  
Pectoral Fin ◽  
Klamath River ◽  
Fin Rays ◽  
Pectoral Fin Rays

Ituglanis compactus, a new species of catfish (Siluriformes: Trichomycteridae) from the rio Jari drainage, lower Amazon, Brazil 

Zootaxa ◽  
2017 ◽  
Vol 4244 (2) ◽  
pp. 207 ◽  
Author(s):  
ÍTHALO DA SILVA CASTRO ◽  
WOLMAR BENJAMIN WOSIACKI
Keyword(s):  
New Species ◽  
Body Size ◽  
Head Length ◽  
New Taxon ◽  
Pectoral Fin ◽  
Reduced Body ◽  
Weberian Apparatus ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

A new species of Ituglanis is described from rio Iratapuru, near the rio Jari, Amapá, Brazil. The new species is distinguished from all congeners by the reduced number of post-Weberian apparatus vertebrae (36 or 37); the low number of paired ribs (2); the low number of interopercular odontodes (12–15); the number of branchiostegal rays (7 or 8); the presence of elongated fontanel in parieto-supraoccipital; the pectoral-fin rays (i,5); head length (18.9–25.0); and the presence of pores supraorbital s1, infraorbitals i1 and i3 of the laterosensory system. The new taxon has a reduced body size and fully ossified skeleton, but does not display a large number of paedomorphic traits compared to congeners. Comments about taxonomy and intrageneric comparisons are made, and paedomorphic in Ituglanis is discussed. Thoughts about conservation of the new species are presented. 

A new species of Jupiaba Zanata, 1997 (Ostariophysi, Characiformes, Characidae) from the rio Tocantins drainage, Brazil

Zootaxa ◽  
2007 ◽  
Vol 1614 (1) ◽  
pp. 53-60 ◽  
Author(s):  
THIAGO N.A. PEREIRA ◽  
PAULO H.F. LUCINDA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Pectoral Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

A new characid species, Jupiaba elassonaktis, is described from the rio Tocantins drainage. The new species is distinguished from its congeners by the following combination of characters: medial cusps of premaxillary teeth much larger than remaining cusps, dentary teeth decreasing abruptly in size from the fifth tooth backwards, first dorsaland anal-fin rays not prolonged by an elongate filament, presence of a vertically elongate humeral spot, 33–39 scales on lateral line, 5–7 scales series above lateral line, 9–11 pectoral-fin rays, and a incomplete series of median predorsal scales.

scholarly journals A new species of Rineloricaria (Siluriformes: Loricariidae: Loricariinae) from rio Daraá, rio Negro basin, Amazon, Brazil

2008 ◽  
Vol 6 (3) ◽  
pp. 339-346 ◽  
Author(s):  
Lúcia H. Rapp Py-Daniel ◽  
Ilana Fichberg
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Variable Size ◽  
Lower Lip ◽  
Rio Negro ◽  
Fin Rays ◽  
Amazonas State ◽  
Rio Negro Basin ◽  
A New Species ◽  
Pectoral Fin Rays

Rineloricaria daraha, new species, is described from the rio Daraá, tributary of rio Negro, northwestern Amazonas State, Brazil. The new species is diagnosed by having seven branched pectoral-fin rays, finger-like papillae on the lower lip, a large multi-angular preanal plate, and at least four quadrangular plates of variable size surrounding the preanal plate. The new species is known only from rio Daraá and its waterfalls.

A new species of Osteobrama (Teleostei: Cyprinidae) from the Mahanadi River, India with a note on the validity of O. dayi

Zootaxa ◽  
2020 ◽  
Vol 4722 (1) ◽  
pp. 68-76
Author(s):  
BUNGDON SHANGNINGAM ◽  
SHIBANANDA RATH ◽  
ASHA KIRAN TUDU ◽  
LAISHRAM KOSYGIN
Keyword(s):  
New Species ◽  
Valid Species ◽  
Pectoral Fin ◽  
Mahanadi River ◽  
Dorsal Fin ◽  
Fin Rays ◽  
The Status ◽  
A New Species ◽  
Pectoral Fin Rays

A new species of the genus Osteobrama is described from the Mahanadi River, Tikarpada, Angul District, Odisha state, India. Osteobrama tikarpadaensis, new species, differs from its congeners in having two pairs of minute barbels; iii–iv unbranched dorsal-fin rays with 25–33 serrae on the last unbranched ray; 15–16 branched pectoral-fin rays, and 25–27 branched anal-fin rays. The status of Osteobrama dayi is discussed and shown to be a valid species. A key to the species of the genus is provided. 

scholarly journals Description of two new species of the catfish genus Trichomycterus from southeastern Brazil (Siluriformes: Trichomycteridae)

Zootaxa ◽  
2004 ◽  
Vol 744 (1) ◽  
pp. 1 ◽  
Author(s):  
ALINE R. ALENCAR ◽  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
River Basins ◽  
Morphological Features ◽  
Southeastern Brazil ◽  
Pectoral Fin ◽  
Fin Ray ◽  
Two New Species ◽  
Fin Rays ◽  
Santa Maria ◽  
Pectoral Fin Rays

Two new species of Trichomycterus from isolated small river basins of southeastern Brazil are described: T. pantherinus, new species, from the Rio Santa Maria da Vit ria basin, and T. caudofasciatus, new species, from the Rio Itabapoana basin. Both new species are diagnosed by a combination of morphological features, also occurring in T. alternatus and T. longibarbatus, including number of pectoral-fin rays, odontodes and branchiostegal rays, long filamentous first pectoral-fin ray and wide opercular patch of odontodes. Trichomycterus pantherinus differs from other congeners by possessing a light orangish yellow flank with dark brown to black rounded spots. Trichomycterus caudofasciatus is distinguished from other species of the genus by having four gray bars on the caudal fin.

A new species of Gorogobius (Perciformes: Gobiidae) from Sao Tomé Islands

Zootaxa ◽  
2008 ◽  
Vol 1686 (1) ◽  
pp. 29 ◽  
Author(s):  
MARCELO KOVAČIĆ ◽  
ULRICH K SCHLIEWEN
Keyword(s):  
New Species ◽  
Generic Diagnosis ◽  
Gulf Of Guinea ◽  
Unique Combination ◽  
Pectoral Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

Gorogobius stevcici sp. nov. is described from the São Tomé Islands, Gulf of Guinea. Although it exhibits the unique combination of characters of Gorogobius Miller, it differs from present generic diagnosis of that genus. Therefore, a revised generic diagnosis and description of Gorogobius is provided. The new species differs from its only congener, G. nigricintus, by (1) presence of pore β; (2) row g anteriorly ends more or less in front of row o; (3) transverse interorbital row p present; (4) snout with four median preorbital rows; (5) 37–41 vs. 29–33 longitudinal scale rows; (6) 22–24 vs. 18 predorsal scales; (7) 9 vs. 10–11 anal fin rays; (8) 17 vs. 18–20 pectoral fin rays; (9) coloration.

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