Is there a relationship between fluctuating asymmetry and reproductive investment in perch (Perca fluviatilis)?

2002 ◽  
Vol 80 (1) ◽  
pp. 120-125 ◽  
Author(s):  
S A Øxnevad ◽  
E Heibo ◽  
L A Vøllestad
Keyword(s):  
Fluctuating Asymmetry ◽  
Perca Fluviatilis ◽  
Branchial Arch ◽  
Pectoral Fin ◽  
Gill Rakers ◽  
Individual Fitness ◽  
Perch Perca Fluviatilis ◽  
Fin Rays ◽  
Acidified Lakes ◽  
Pectoral Fin Rays

Fluctuating asymmetry (FA), or random deviation from perfect bilateral symmetry, is often used as an indicator of perturbed development. Several studies attempt to correlate FA with components of individual fitness or population viability. In this study we test for a correlation between FA and four fitness traits in female Eurasian perch (Perca fluviatilis) inhabiting acidified or non-acidified lakes. Three bilateral meristic characters were counted on each side of the fish: number of gill rakers on the lower first branchial arch, number of gill rakers on the upper first branchial arch, and number of pectoral-fin rays. An asymmetry index summarizing the numbers of asymmetric characters per fish was also calculated. Four traits related to fitness were measured: gonad dry mass, egg mass, gonadosomatic index, and fecundity. There were significant differences in FA among the five perch populations for the characters number of pectoral-fin rays and number of upper gill rakers, and also for the FA index. Asymmetry was generally greater in perch living in acidified lakes than in those in non-acidified lakes. However, there was no significant correlation between FA and any of the four fitness-related traits within populations. Therefore, asymmetry in the traits measured here may not be a good indicator of individual fitness in perch.

Moema apurinan sp. n. and Aphyolebias boticarioi sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new annual killifishes from the Rio Purus basin, Brazilian Amazon

Zootaxa ◽  
2004 ◽  
Vol 707 (1) ◽  
pp. 1 ◽  
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
Brazilian Amazon ◽  
Color Patterns ◽  
Pectoral Fin ◽  
Gill Rakers ◽  
Caudal Fin ◽  
Black Stripe ◽  
Fin Rays ◽  
Northern Brazil ◽  
Pectoral Fin Rays

Two new annual fishes are described from the upper Rio Purus drainage, Amazonian basin, northern Brazil. Moema apurinan, new species, is similar to M. staecki, these two species distinguished from other congeners in having contact organs on scales of the flank in males, an acuminate caudal fin, fewer pectoral-fin rays, fewer vertebrae, and a narrower rostral cartilage. Moema apurinan differs from M. staecki in having a longer pectoral fin and a wider basihyal. Moema apurinan is distinguished from all other congeners by possessing fewer caudal-fin rays. Aphyolebias boticarioi, new species, differs from all other congeners by having a deeper body. It is similar to A. rubrocaudatus, A. obliquus, A. claudiae and A. schleseri in having a ventral marginal black stripe on the caudal fin in males. Aphyolebias boticarioi differs from these species by a combination of features including number of anal-fin rays, pectoral-fin rays, vertebrae and gill-rakers, and color patterns.

scholarly journals A review of the species in the Apogon fasciatus group with a description of a new species of cardinalfish from the Indo-West Pacific (Perciformes: Apogonidae)

Zootaxa ◽  
2005 ◽  
Vol 924 (1) ◽  
pp. 1 ◽  
Author(s):  
THOMAS H. FRASER
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Pectoral Fin ◽  
Gill Rakers ◽  
Caudal Peduncle ◽  
Fin Rays ◽  
Vertical Bars ◽  
Ventral Edge ◽  
A New Species ◽  
Pectoral Fin Rays

Nine nominal, Indo-West Pacfic species are treated: Apogon fasciatus (White, 1790), Apogon quadrifasciatus Cuvier in Cuvier & Valenciennes, 1828, Apogon monogramma Günther, 1880, Apogon septemstriatus Günther, 1880, Apogon evanidus Fowler 1904, Apogon elizabethae (Jordan & Seale, 1905), Apogon quinquestriatus Regan, 1908, Apogon kiensis Jordan & Snyder, 1901 and Apogon bryx Fraser, 1998. Four species treated as valid have VII first-dorsal spines: Apogon fasciatus with two brownish stripes on each side of the head and body to caudal peduncle and a faint, variable stripe along a portion of the lateral-line, 16 (15) pectoral-fin rays, and 14–17 (12, 13 or 18) gill rakers, Apogon quinquestriatus with four brownish stripes on each side of head and body, two reaching the caudal peduncle, 15 pectoral-fin rays, and 15 gill rakers, Apogon septemstriatus with three brownish stripes on each side of head and body, three reaching the caudal peduncle, 14 (13) pectoral-fin rays, and 14–16 gill rakers, Apogon pleuron, new species, with two brownish stripes on each side of head and body reaching the caudal peduncle, ventral edge of midlateral stripe with vertical bars, 15 (14 or16) pectoral-fin rays, and 17–20 (15, 16 or 21) gill rakers. Two species treated as valid have VI first-dorsal spines: Apogon bryx with three brownish stripes on each side of head and body, two reaching the caudal peduncle, 14–15 pectoral-fin rays, and 22–23 (21 or 24) gill rakers, Apogon kiensis, with two brownish stripes on each side of head and body reaching the caudal peduncle, 14–15 pectoral-fin rays, and 16–18 (15 or 19-20) gill rakers. The long recognized name, Apogon quadrifasciatus, is synonymous with Apogon fasciatus.

scholarly journals Plectorhinchus makranensis (Teleostei, Haemulidae), a new species of sweetlips from the Persian Gulf and the Gulf of Oman

ZooKeys ◽  
2020 ◽  
Vol 980 ◽  
pp. 141-154
Author(s):  
Ehsan Damadi ◽  
Faezeh Yazdani Moghaddam ◽  
Fereshteh Ghassemzadeh ◽  
Mehdi Ghanbarifardi
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Persian Gulf ◽  
Pectoral Fin ◽  
Gill Rakers ◽  
Gulf Of Oman ◽  
Dorsal Fin ◽  
Fin Rays ◽  
The Persian Gulf ◽  
Pectoral Fin Rays

Plectorhinchus makranensissp. nov. is described on the basis of 16 specimens from the Persian Gulf and Gulf of Oman, in the Northwest Indian Ocean. The new species can be distinguished from congeners by a combination of dorsal fin rays XII, 18–20, pectoral-fin rays 16–17, tubed lateral-line scales 55–57, gill rakers count (10–12 on the upper limb and 16–17 on the lower limb), 17–18 scales between the lateral line and the first anal-fin spine, 30–31 circumpeduncular scale rows and color pattern. Plectorhinchus makranensissp. nov. is distinguished from P. schotaf by having the posterior margin of the opercular membrane grey (vs. red in P. schotaf), fewer circumpeduncular scale rows, and a shorter base of the soft portion of the dorsal fin, 27.6–29.4% of standard length (SL) (vs. 31–32.3% of SL in P. schotaf). The new species resembles P. sordidus but is differentiated from it by having more gill rakers, a smaller orbit diameter 27.5–32.1% of head length (HL) (vs. 35.5–37.2% of HL in P. sordidus), a longer caudal peduncle 19.2–21.3% of SL (vs. 17.1–17.9% of SL in P. sordidus), and the first to third pectoral-fin rays light gray (vs. dark gray in P. sordidus). The new species can also be distinguished from the other species, including P. schotaf and P. sordidus, based on COI and Cyt b molecular markers. The phylogenetic position of this new species indicates that it is a sister taxon of P. schotaf.

Validity and redescription of the flathead fish, Onigocia macrocephala (Weber, 1913) (Teleostei: Platycephalidae)

Zootaxa ◽  
2012 ◽  
Vol 3450 (1) ◽  
pp. 23 ◽  
Author(s):  
HISASHI IMAMURA
Keyword(s):  
Posterior Margin ◽  
Taxonomic Status ◽  
Original Description ◽  
Distinct Species ◽  
Valid Species ◽  
Pectoral Fin ◽  
Gill Rakers ◽  
Caudal Fin ◽  
Fin Rays ◽  
Pectoral Fin Rays

After the original description, Platycephalus macrocephalus Weber, 1913 has been rarely treated as a valid species and its taxonomic status has been unclear. It was revealed here that seven syntypes of the species belong to two species and four of them are identical with Onigocia grandisquama (Regan, 1908) but the remaining three specimens are identified as a distinct species of Onigocia Jordan & Thompson, 1913, which has been mistakenly identified as Onigocia macrolepis (Bleeker, 1854) by several authors. One of the three specimens illustrated in the original description is designated as the lectotype of the species. Onigocia macrocephala is separable from its other congeners in having 21–23 (mode 22) pectoral fin rays, 9–10 caudal fin rays, 1 + 4–6 = 5–7 (mode 6) gill rakers, a larger head (38.8–42.3% SL), a single ocular flap present and usually extending slightly beyond the posterior margin of the orbit, a few or several small and short papillae on the posteromedial portion of the eye in larger specimens, the upper iris lappet short and branched, the lachrymal with two distinct antrorse spines anteriorly, a notch on the suborbital ridge below the eye, and no interopercular flap.

Navigobius kaguya, new species of ptereleotrine goby (Teleostei: Gobiidae) from the West Pacific

Zootaxa ◽  
2017 ◽  
Vol 4347 (2) ◽  
pp. 371 ◽  
Author(s):  
ANTHONY C. GILL ◽  
YI-KAI TEA ◽  
HIROSHI SENOU
Keyword(s):  
New Species ◽  
Ryukyu Islands ◽  
Undescribed Species ◽  
Pectoral Fin ◽  
The West ◽  
Gill Rakers ◽  
Dorsal Fin ◽  
The Ryukyu Islands ◽  
Fin Rays ◽  
Pectoral Fin Rays

Navigobius kaguya is described on the basis of two specimens from the Ryukyu Islands, Japan, and Luzon, Philippines. It differs from other described species of the genus in live coloration, and in having: second dorsal-fin rays I,16; anal-fin rays I,16; pectoral-fin rays 21–22; gill rakers 5–6 + 17; and first dorsal fin weakly to moderately incised between spines, taller than second dorsal. It closely resembles an undescribed species from Bali and the Maldives, but differs in lacking an orange-red mid-lateral stripe. The possible placement of Navigobius khanhoa in Oxymetapon is discussed. 

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.

scholarly journals A new species of Pimelodus La Cépède, 1803 (Siluriformes: Pimelodidae) from rio Ribeira de Iguape basin, Brazil

2011 ◽  
Vol 9 (1) ◽  
pp. 127-134 ◽  
Author(s):  
Frank Raynner V Ribeiro ◽  
Carlos Alberto S. de Lucena ◽  
Osvaldo T Oyakawa
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
Branchial Arch ◽  
The Other ◽  
Gill Rakers ◽  
Caudal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pelvic Fin

Pimelodus multicratifer, a new species, is described from the rio Ribeira de Iguape basin. The new species differs from the other Pimelodus species by the following features: 26 to 30 gill rakers on the first branchial arch; a combination of three to six rows of dark spots regularly or irregularly scattered on the flanks and several small dark spots irregularly scattered on the dorsal surface of head, supraoccipital process, and sometimes on the dorsal and caudal fins; striated lips; maxillary barbels reaching between posterior tip of the pelvic-fin rays and posterior tip of the middle caudal-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. 

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