Contents

Journal of Ichthyology

Vol. 61, No. 3, 2021

A Review of Sculpins (COTTOIDEI) of Middle Asia with a Revalidation of the Species Cottus jaxartensis and Description of a New Species Cottus nudus sp. nova

V. G. Sideleva p. 327  abstract

Taxonomic Status of Four Rare Alien Fish Species of the Kapchagay Reservoir (Balkhash Basin, Central Asia)

N. Sh. Mamilov, T. G. Konysbaev, I. N. Magda and E. D. Vasil’eva p. 339  abstract

Atypical Structure of Olfactory Organ in Moon Wrasse Thalassoma lunare and Sixbar Wrasse T. hardwicke (Labridae)

N. I. Pashchenko, A. O. Kasumyan and L. T. K. Oanh p. 348  abstract

Overview of the Composition and Spatial Distribtion of the Communities of Deep-Water Pelagic Fish in the Tropical Waters of the Mid-Atlantic Ridge in the Russian Exploration Area

S. G. Kobyliansky, A. V. Mishin, Ya. Yu. Bolshakova and A. N. Kotlyar p. 361  abstract

First DNA Barcoding-based Inventory of Suez Gulf Fishes in Egypt and its Implication for Species Diversity

E. M. Abbas, M. Ismail, A. El-Ganainy and F. S. Ali p. 386  abstract

Finding of Arcrtic Charr Salvelinus alpinus (Salmonidae) and Sculpin Cottus cf. poecilopus (Cottidae) in the Verkhnyaya Angara basin Near the Divide with the Lena River System: New Data About the Invasion Routes of the Representatives of Lena Ichthyofauna Into Baikal Basin

S. S. Alekseyev, V. P. Samusenok, A. N. Matveev, R. S. Andreev, I. V. Samusenok, A. I. Vokin and A. L. Yur’ev p. 396  abstract

Variability of Morphobiological Characteristics of the Pacific Herring Clupea pallasii from Arctic and Pacific Populations

A. N. Stroganov, A. V. Semenova, M. O. Rybakov and A. A. Smirnov p. 407  abstract

Isolated Fluvial Population of Dolly Varden Salvelinus malma on Bering Island (Commander Islands)

A. M. Malyutina, K. V. Kuzishchin, A. V. Semenova and M. A. Gruzdeva p. 418  abstract

Population Status of Two Wedgefish Species in Western Indonesian Inner Waters, Inferred from Demographic Models with Limited Data

W. Kurniawan, S. Oktaviyani, B. M. Simeon, S. Ula, D. P. Yuwandana, R. R. Yuneni, P. Yudiarso, U. Chodrijah and Fahmi p. 433  abstract

Precision of Age Estimates Obtained from Five Calcified Structure for Wels Catfish, Silurus glanis

R. Yazici, M. Yilmaz and O. Yazicioğlu p. 452  abstract

Reproductive Biology of the Endemic Fish Etroplus suratensis (Cichlidae) from a Tropical Estuary in Southern India

K. Roshni, C. R. Renjithkumar and B. M. Kurup p. 460  abstract

Spermatogenic Ultrastructure of the Grunting Toadfish Allenbatrachus grunniens (Batrachoididae)

N. Sukkhee, T. Mitparian, T. Kanjanarakha, S. Senarat, W. Jiraungkoorskul, N. Kangwanrangsan, G. Kaneko and J. Kettratad p. 467  abstract

Agonistic Behavior of Young Perch Perca fluviatilis: The Effects of Fish Size and Macroparasite Load

V. M. Slivko, A. E. Zhokhov, M. V. Gopko and V. N. Mikheev p. 476  abstract

Short Communication

New Data on Morphology, Distribution, and Ecology of the Tentacled Lumpsucker Cyclopsis tentacularis (Cyclopteridae) in the Sea of Okhotsk

P. A. Saveliev, V. N. Tuponogov and M. I. Boiko p. 482  abstract