>
Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Sarotherodon: Greek, saros, -ou = sawdust + Greek, ther = animal * Greek, odous = teeth (Ref. 45335); knauerae: Named for Mrs. Barbara Knauer, former technician at the Max-Planck-Institut (Seewiesen), who substantially supported UKS as a technician and friend during his PhD studies (Ref. 86429).
Eponymy: Barbara Knauer was a technician at the Max Planck Society at Seewiesen, Germany. According to the etymology, she “…substantially supported [the third author Dr Ulrich Schliewen] as a technician and friend” during his Ph.D. studies. (Ref. 128868), visit book page.
Môi trường: môi trường / vùng khí hậu / Mức độ sâu / phạm vi phân phối
Sinh thái học
; nước ngọt sống nổi và đáy, usually 0 - 3 m (Ref. 86429). Tropical; 6°N - 5°N, 8°E - 9°E
Africa: Lake Ejagham in Cameroon (Ref. 86429).
Bộ gần gũi / Khối lượng (Trọng lượng) / Tuổi
Chín muồi sinh dục: Lm ?  range ? - ? cm
Max length : 7.7 cm SL con đực/không giới tính; (Ref. 86429)
Mô tả ngắn gọn
Khóa để định loại | Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng) : 15 - 16; Các vây lưng mềm (tổng cộng) : 13 - 14; Tia cứng vây hậu môn: 3; Tia mềm vây hậu môn: 10 - 12. Diagnosis: Sarotherodon knauerae is distinguished from all congeners by the possession of an inflated second pharyngobranchial element in the upper pharyngeal jaw, and is one of the smallest known Sarotherodon, reaching a maximum observed size of only 75.2 mm standard length (Ref. 86429). It further differs from sympatric Sarotherodon lamprechti in possessing a terminal, vs. prognathous, mouth; scaled pectoral fin base; short pectoral fins ending at or in front of anus, vs. reaching first anal fin-spine or beyond; and short pelvic fins ending well in front of anus, vs. reaching anus; additionally, S. knauerae possesses a shorter upper lip, 19.1–25.4% of head length vs. 22.5–28.4%, a higher total gill raker count, 24–30 vs. 20–25, and larger eyes, 24.0–31.2% of head length vs. 20.4–29.2% (Ref. 86429). It is distinguished from neighbouring riverine S. galilaeus populations from Cross, Wouri and Lower Niger rivers, S. g. multifasciatus and S. g. borkuanus by a shorter anal fin, 12.0–14.6% of standard length vs. 15.3–19.3%, 15.1–25.7% and 13.4–17.9% respectively; and narrower caudal peduncle, 12.8–14.5% of standard length vs. 16.0–18.7%, 13.9–18.3% and 13.6–17.4% respectively (Ref. 86429). It differs from S. caroli and S. linnellii in higher gill raker counts, 24–30 vs. 18–20 and 15–18 respectively; from S. g. sanagaensis in a lower preorbital depth, 17.8–23.0% of head length vs. 25.0–27.8%; and from S. g. boulengeri and riverine Sarotherodon galilaeus in a lower body depth, 36.5–43.9% of standard length vs. 44.5–50.0% and 43.5–44.6% respectively (Ref. 86429). Finally it differs from all other Lake Barombi Mbo Sarotherodon in a higher number of dorsal fin-rays, 13-14 vs. 10–12 (Ref. 86429).
Body shape (shape guide): short and / or deep.
A gregarious, predominantly benthic species found in Lake Ejagham; present in all habitats and at all depths, but most common inshore, to 3 m, than in deeper zones (Ref. 86429). The species is a detritivore, taking detritus from both soft and hard substrates as well as from the water surface (Ref. 86429). Presence of numerous juveniles in the dry season, January-February, suggests that reproduction takes place predominantly in the rainy season, August-September (Ref. 86429). Males do not vigorously defend courtship territories with a bower; in aquaria Sarotherodon knauerae are maternal mouth brooders (Ref. 86429).
Vòng đời và hành vi giao phối
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
In aquaria Sarotherodon knauerae are maternal mouth brooders (Ref. 86429).
Neumann, D., M.L.J. Stiassny and U.K. Schliewen, 2011. Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex. Zootaxa 2765:1-20 (Ref. 86429)
Tình trạng Sách đỏ IUCN (Ref. 130435: Version 2025-2 (Global))
Mối đe dọa đối với con người
Harmless
Sử dụng của con người
Các công cụ
Báo cáo đặc biệt
Tải xuống XML
Các nguồn internet
Ước tính dựa trên mô hình
Chỉ số đa dạng phát sinh loài (Tài liệu tham khảo 82804) |
PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
a=0.01862 (0.00830 - 0.04177), b=3.02 (2.83 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Mức dinh dưỡng (Tài liệu tham khảo 69278) |
2.5 ±0.2 se; based on size and trophs of closest relatives |
Sự dễ bị tổn thương của nghề đánh cá (Ref. 59153) |
Low vulnerability (12 of 100). 🛈 |