Chemical Pollution and the Population Crisis of Hector’s and Māui Dolphins. A Critical Research Bibliography, 1970–2026.
DOI:
https://doi.org/10.66659/ybmw2c82Keywords:
Hector’s dolphin; Māui dolphin; Cephalorhynchus hectori; chemical pollution; persistent organic pollutants; dioxins and furans; PCDD/F; polychlorinated biphenyls; organochlorine pesticides; PFAS; Paritutu; New Plymouth; biomagnification; maternal transfer; immunotoxicity; reproductive toxicity; toxoplasmosis; brucellosis; bycatch; population viability; risk assessment; scientific non-recognition; critical reconstruction; New Zealand.Abstract
Background and objective. Hector’s dolphin (Cephalorhynchus hectori hectori) and the critically endangered Māui dolphin (C. h. maui) have declined amid documented bycatch, disease, habitat pressures, and chemical contamination. This study completes the bibliographic-reconstruction phase of a broader investigation into whether chemical exposure has been under-recognised as a causal, contributory, or synergistic threat.
Methods. A maximum-coverage bibliography for 1970–22 June 2026 was compiled from official Department of Conservation bibliographies, the 2024 NOAA/NMFS review, primary and grey literature, New Zealand contaminant monitoring, the Paritutu/New Plymouth exposure corpus, comparative marine-mammal toxicology, pathology, demography, bycatch research, and risk-governance studies. Records were deduplicated, classified into five thematic layers, and 50 key sources were analytically annotated.
Results. The corpus contains 388 unique records. Evidence confirms exposure to persistent organic pollutants and PFAS, trophic biomagnification, maternal transfer, and plausible immunotoxic and reproductive mechanisms. However, Māui-specific samples remain extremely small, modern PCDD/F coverage is limited, and no study links a defined source through internal dose and individual health effects to a quantified population outcome.
References
1. Gibbs, Andrew, and Dmitry Nikolaenko. 2026. “Competing Hypotheses and Scientific Non-Recognition: Investigating the Hector’s and Māui Dolphin Decline in the Context of Wartime Chemical Legacies”. Pollution and Diseases, June. https://doi.org/10.66659/10csws50
2. Gibbs, Andrew. 2026. “Beyond the TCDD Lens in Paritutu New Plymouth, New Zealand: Invisible Phenoxy-Herbicide Co-Contaminants, Visible Developmental Signals, and Decision-Making under Incomplete Evidence”. Pollution and Diseases, May. https://doi.org/10.66659/ar7fqk65
3. Nikolaenko, Dmitry. 2026. “From Individual Events to the Morphology of Military Contamination: An Epistemological Study of Form, Process, and Morphogenesis. ”. Pollution and Diseases, June, 55 pages. https://doi.org/10.66659/resz8h58
4. Nikolaenko, Dmitry. 2026. “Military Contamination and Regimes of Scientific Recognition: A Conceptual Framework”. Pollution and Diseases, June, 15 pages. https://doi.org/10.66659/bb4q9n88
